Initial commit

4 files changed, 845 insertions, 0 deletions

diff --git a/node_modules/seek-bzip/lib/bitreader.js b/node_modules/seek-bzip/lib/bitreader.js
new file mode 100644
index 0000000..7bcb396
--- /dev/null
+++ b/node_modules/seek-bzip/lib/bitreader.js
@@ -0,0 +1,94 @@
+/*
+node-bzip - a pure-javascript Node.JS module for decoding bzip2 data
+
+Copyright (C) 2012 Eli Skeggs
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Adapted from bzip2.js, copyright 2011 antimatter15 (antimatter15@gmail.com).
+
+Based on micro-bunzip by Rob Landley (rob@landley.net).
+
+Based on bzip2 decompression code by Julian R Seward (jseward@acm.org),
+which also acknowledges contributions by Mike Burrows, David Wheeler,
+Peter Fenwick, Alistair Moffat, Radford Neal, Ian H. Witten,
+Robert Sedgewick, and Jon L. Bentley.
+*/
+
+var BITMASK = [0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF];
+
+// offset in bytes
+var BitReader = function(stream) {
+  this.stream = stream;
+  this.bitOffset = 0;
+  this.curByte = 0;
+  this.hasByte = false;
+};
+
+BitReader.prototype._ensureByte = function() {
+  if (!this.hasByte) {
+    this.curByte = this.stream.readByte();
+    this.hasByte = true;
+  }
+};
+
+// reads bits from the buffer
+BitReader.prototype.read = function(bits) {
+  var result = 0;
+  while (bits > 0) {
+    this._ensureByte();
+    var remaining = 8 - this.bitOffset;
+    // if we're in a byte
+    if (bits >= remaining) {
+      result <<= remaining;
+      result |= BITMASK[remaining] & this.curByte;
+      this.hasByte = false;
+      this.bitOffset = 0;
+      bits -= remaining;
+    } else {
+      result <<= bits;
+      var shift = remaining - bits;
+      result |= (this.curByte & (BITMASK[bits] << shift)) >> shift;
+      this.bitOffset += bits;
+      bits = 0;
+    }
+  }
+  return result;
+};
+
+// seek to an arbitrary point in the buffer (expressed in bits)
+BitReader.prototype.seek = function(pos) {
+  var n_bit = pos % 8;
+  var n_byte = (pos - n_bit) / 8;
+  this.bitOffset = n_bit;
+  this.stream.seek(n_byte);
+  this.hasByte = false;
+};
+
+// reads 6 bytes worth of data using the read method
+BitReader.prototype.pi = function() {
+  var buf = new Buffer(6), i;
+  for (i = 0; i < buf.length; i++) {
+    buf[i] = this.read(8);
+  }
+  return buf.toString('hex');
+};
+
+module.exports = BitReader;
diff --git a/node_modules/seek-bzip/lib/crc32.js b/node_modules/seek-bzip/lib/crc32.js
new file mode 100644
index 0000000..8c9a169
--- /dev/null
+++ b/node_modules/seek-bzip/lib/crc32.js
@@ -0,0 +1,104 @@
+/* CRC32, used in Bzip2 implementation.
+ * This is a port of CRC32.java from the jbzip2 implementation at
+ *   https://code.google.com/p/jbzip2
+ * which is:
+ *   Copyright (c) 2011 Matthew Francis
+ *
+ *   Permission is hereby granted, free of charge, to any person
+ *   obtaining a copy of this software and associated documentation
+ *   files (the "Software"), to deal in the Software without
+ *   restriction, including without limitation the rights to use,
+ *   copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *   copies of the Software, and to permit persons to whom the
+ *   Software is furnished to do so, subject to the following
+ *   conditions:
+ *
+ *   The above copyright notice and this permission notice shall be
+ *   included in all copies or substantial portions of the Software.
+ *
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *   OTHER DEALINGS IN THE SOFTWARE.
+ * This JavaScript implementation is:
+ *   Copyright (c) 2013 C. Scott Ananian
+ * with the same licensing terms as Matthew Francis' original implementation.
+ */
+module.exports = (function() {
+
+  /**
+   * A static CRC lookup table
+   */
+  var crc32Lookup = new Uint32Array([
+    0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
+    0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
+    0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
+    0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
+    0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
+    0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
+    0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
+    0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
+    0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
+    0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
+    0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
+    0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
+    0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
+    0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
+    0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
+    0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
+    0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
+    0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
+    0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
+    0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
+    0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
+    0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
+    0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
+    0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
+    0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
+    0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
+    0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
+    0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
+    0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
+    0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
+    0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
+    0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
+  ]);
+
+  var CRC32 = function() {
+    /**
+     * The current CRC
+     */
+    var crc = 0xffffffff;
+
+    /**
+     * @return The current CRC
+     */
+    this.getCRC = function() {
+      return (~crc) >>> 0; // return an unsigned value
+    };
+
+    /**
+     * Update the CRC with a single byte
+     * @param value The value to update the CRC with
+     */
+    this.updateCRC = function(value) {
+      crc = (crc << 8) ^ crc32Lookup[((crc >>> 24) ^ value) & 0xff];
+    };
+
+    /**
+     * Update the CRC with a sequence of identical bytes
+     * @param value The value to update the CRC with
+     * @param count The number of bytes
+     */
+    this.updateCRCRun = function(value, count) {
+      while (count-- > 0) {
+        crc = (crc << 8) ^ crc32Lookup[((crc >>> 24) ^ value) & 0xff];
+      }
+    };
+  };
+  return CRC32;
+})();
diff --git a/node_modules/seek-bzip/lib/index.js b/node_modules/seek-bzip/lib/index.js
new file mode 100644
index 0000000..f3bab49
--- /dev/null
+++ b/node_modules/seek-bzip/lib/index.js
@@ -0,0 +1,605 @@
+/*
+seek-bzip - a pure-javascript module for seeking within bzip2 data
+
+Copyright (C) 2013 C. Scott Ananian
+Copyright (C) 2012 Eli Skeggs
+Copyright (C) 2011 Kevin Kwok
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Adapted from node-bzip, copyright 2012 Eli Skeggs.
+Adapted from bzip2.js, copyright 2011 Kevin Kwok (antimatter15@gmail.com).
+
+Based on micro-bunzip by Rob Landley (rob@landley.net).
+
+Based on bzip2 decompression code by Julian R Seward (jseward@acm.org),
+which also acknowledges contributions by Mike Burrows, David Wheeler,
+Peter Fenwick, Alistair Moffat, Radford Neal, Ian H. Witten,
+Robert Sedgewick, and Jon L. Bentley.
+*/
+
+var BitReader = require('./bitreader');
+var Stream = require('./stream');
+var CRC32 = require('./crc32');
+var pjson = require('../package.json');
+
+var MAX_HUFCODE_BITS = 20;
+var MAX_SYMBOLS = 258;
+var SYMBOL_RUNA = 0;
+var SYMBOL_RUNB = 1;
+var MIN_GROUPS = 2;
+var MAX_GROUPS = 6;
+var GROUP_SIZE = 50;
+
+var WHOLEPI = "314159265359";
+var SQRTPI = "177245385090";
+
+var mtf = function(array, index) {
+  var src = array[index], i;
+  for (i = index; i > 0; i--) {
+    array[i] = array[i-1];
+  }
+  array[0] = src;
+  return src;
+};
+
+var Err = {
+  OK: 0,
+  LAST_BLOCK: -1,
+  NOT_BZIP_DATA: -2,
+  UNEXPECTED_INPUT_EOF: -3,
+  UNEXPECTED_OUTPUT_EOF: -4,
+  DATA_ERROR: -5,
+  OUT_OF_MEMORY: -6,
+  OBSOLETE_INPUT: -7,
+  END_OF_BLOCK: -8
+};
+var ErrorMessages = {};
+ErrorMessages[Err.LAST_BLOCK] =            "Bad file checksum";
+ErrorMessages[Err.NOT_BZIP_DATA] =         "Not bzip data";
+ErrorMessages[Err.UNEXPECTED_INPUT_EOF] =  "Unexpected input EOF";
+ErrorMessages[Err.UNEXPECTED_OUTPUT_EOF] = "Unexpected output EOF";
+ErrorMessages[Err.DATA_ERROR] =            "Data error";
+ErrorMessages[Err.OUT_OF_MEMORY] =         "Out of memory";
+ErrorMessages[Err.OBSOLETE_INPUT] = "Obsolete (pre 0.9.5) bzip format not supported.";
+
+var _throw = function(status, optDetail) {
+  var msg = ErrorMessages[status] || 'unknown error';
+  if (optDetail) { msg += ': '+optDetail; }
+  var e = new TypeError(msg);
+  e.errorCode = status;
+  throw e;
+};
+
+var Bunzip = function(inputStream, outputStream) {
+  this.writePos = this.writeCurrent = this.writeCount = 0;
+
+  this._start_bunzip(inputStream, outputStream);
+};
+Bunzip.prototype._init_block = function() {
+  var moreBlocks = this._get_next_block();
+  if ( !moreBlocks ) {
+    this.writeCount = -1;
+    return false; /* no more blocks */
+  }
+  this.blockCRC = new CRC32();
+  return true;
+};
+/* XXX micro-bunzip uses (inputStream, inputBuffer, len) as arguments */
+Bunzip.prototype._start_bunzip = function(inputStream, outputStream) {
+  /* Ensure that file starts with "BZh['1'-'9']." */
+  var buf = new Buffer(4);
+  if (inputStream.read(buf, 0, 4) !== 4 ||
+      String.fromCharCode(buf[0], buf[1], buf[2]) !== 'BZh')
+    _throw(Err.NOT_BZIP_DATA, 'bad magic');
+
+  var level = buf[3] - 0x30;
+  if (level < 1 || level > 9)
+    _throw(Err.NOT_BZIP_DATA, 'level out of range');
+
+  this.reader = new BitReader(inputStream);
+
+  /* Fourth byte (ascii '1'-'9'), indicates block size in units of 100k of
+     uncompressed data.  Allocate intermediate buffer for block. */
+  this.dbufSize = 100000 * level;
+  this.nextoutput = 0;
+  this.outputStream = outputStream;
+  this.streamCRC = 0;
+};
+Bunzip.prototype._get_next_block = function() {
+  var i, j, k;
+  var reader = this.reader;
+  // this is get_next_block() function from micro-bunzip:
+  /* Read in header signature and CRC, then validate signature.
+     (last block signature means CRC is for whole file, return now) */
+  var h = reader.pi();
+  if (h === SQRTPI) { // last block
+    return false; /* no more blocks */
+  }
+  if (h !== WHOLEPI)
+    _throw(Err.NOT_BZIP_DATA);
+  this.targetBlockCRC = reader.read(32) >>> 0; // (convert to unsigned)
+  this.streamCRC = (this.targetBlockCRC ^
+                    ((this.streamCRC << 1) | (this.streamCRC>>>31))) >>> 0;
+  /* We can add support for blockRandomised if anybody complains.  There was
+     some code for this in busybox 1.0.0-pre3, but nobody ever noticed that
+     it didn't actually work. */
+  if (reader.read(1))
+    _throw(Err.OBSOLETE_INPUT);
+  var origPointer = reader.read(24);
+  if (origPointer > this.dbufSize)
+    _throw(Err.DATA_ERROR, 'initial position out of bounds');
+  /* mapping table: if some byte values are never used (encoding things
+     like ascii text), the compression code removes the gaps to have fewer
+     symbols to deal with, and writes a sparse bitfield indicating which
+     values were present.  We make a translation table to convert the symbols
+     back to the corresponding bytes. */
+  var t = reader.read(16);
+  var symToByte = new Buffer(256), symTotal = 0;
+  for (i = 0; i < 16; i++) {
+    if (t & (1 << (0xF - i))) {
+      var o = i * 16;
+      k = reader.read(16);
+      for (j = 0; j < 16; j++)
+        if (k & (1 << (0xF - j)))
+          symToByte[symTotal++] = o + j;
+    }
+  }
+
+  /* How many different huffman coding groups does this block use? */
+  var groupCount = reader.read(3);
+  if (groupCount < MIN_GROUPS || groupCount > MAX_GROUPS)
+    _throw(Err.DATA_ERROR);
+  /* nSelectors: Every GROUP_SIZE many symbols we select a new huffman coding
+     group.  Read in the group selector list, which is stored as MTF encoded
+     bit runs.  (MTF=Move To Front, as each value is used it's moved to the
+     start of the list.) */
+  var nSelectors = reader.read(15);
+  if (nSelectors === 0)
+    _throw(Err.DATA_ERROR);
+
+  var mtfSymbol = new Buffer(256);
+  for (i = 0; i < groupCount; i++)
+    mtfSymbol[i] = i;
+
+  var selectors = new Buffer(nSelectors); // was 32768...
+
+  for (i = 0; i < nSelectors; i++) {
+    /* Get next value */
+    for (j = 0; reader.read(1); j++)
+      if (j >= groupCount) _throw(Err.DATA_ERROR);
+    /* Decode MTF to get the next selector */
+    selectors[i] = mtf(mtfSymbol, j);
+  }
+
+  /* Read the huffman coding tables for each group, which code for symTotal
+     literal symbols, plus two run symbols (RUNA, RUNB) */
+  var symCount = symTotal + 2;
+  var groups = [], hufGroup;
+  for (j = 0; j < groupCount; j++) {
+    var length = new Buffer(symCount), temp = new Uint16Array(MAX_HUFCODE_BITS + 1);
+    /* Read huffman code lengths for each symbol.  They're stored in
+       a way similar to mtf; record a starting value for the first symbol,
+       and an offset from the previous value for everys symbol after that. */
+    t = reader.read(5); // lengths
+    for (i = 0; i < symCount; i++) {
+      for (;;) {
+        if (t < 1 || t > MAX_HUFCODE_BITS) _throw(Err.DATA_ERROR);
+        /* If first bit is 0, stop.  Else second bit indicates whether
+           to increment or decrement the value. */
+        if(!reader.read(1))
+          break;
+        if(!reader.read(1))
+          t++;
+        else
+          t--;
+      }
+      length[i] = t;
+    }
+
+    /* Find largest and smallest lengths in this group */
+    var minLen,  maxLen;
+    minLen = maxLen = length[0];
+    for (i = 1; i < symCount; i++) {
+      if (length[i] > maxLen)
+        maxLen = length[i];
+      else if (length[i] < minLen)
+        minLen = length[i];
+    }
+
+    /* Calculate permute[], base[], and limit[] tables from length[].
+     *
+     * permute[] is the lookup table for converting huffman coded symbols
+     * into decoded symbols.  base[] is the amount to subtract from the
+     * value of a huffman symbol of a given length when using permute[].
+     *
+     * limit[] indicates the largest numerical value a symbol with a given
+     * number of bits can have.  This is how the huffman codes can vary in
+     * length: each code with a value>limit[length] needs another bit.
+     */
+    hufGroup = {};
+    groups.push(hufGroup);
+    hufGroup.permute = new Uint16Array(MAX_SYMBOLS);
+    hufGroup.limit = new Uint32Array(MAX_HUFCODE_BITS + 2);
+    hufGroup.base = new Uint32Array(MAX_HUFCODE_BITS + 1);
+    hufGroup.minLen = minLen;
+    hufGroup.maxLen = maxLen;
+    /* Calculate permute[].  Concurently, initialize temp[] and limit[]. */
+    var pp = 0;
+    for (i = minLen; i <= maxLen; i++) {
+      temp[i] = hufGroup.limit[i] = 0;
+      for (t = 0; t < symCount; t++)
+        if (length[t] === i)
+          hufGroup.permute[pp++] = t;
+    }
+    /* Count symbols coded for at each bit length */
+    for (i = 0; i < symCount; i++)
+      temp[length[i]]++;
+    /* Calculate limit[] (the largest symbol-coding value at each bit
+     * length, which is (previous limit<<1)+symbols at this level), and
+     * base[] (number of symbols to ignore at each bit length, which is
+     * limit minus the cumulative count of symbols coded for already). */
+    pp = t = 0;
+    for (i = minLen; i < maxLen; i++) {
+      pp += temp[i];
+      /* We read the largest possible symbol size and then unget bits
+         after determining how many we need, and those extra bits could
+         be set to anything.  (They're noise from future symbols.)  At
+         each level we're really only interested in the first few bits,
+         so here we set all the trailing to-be-ignored bits to 1 so they
+         don't affect the value>limit[length] comparison. */
+      hufGroup.limit[i] = pp - 1;
+      pp <<= 1;
+      t += temp[i];
+      hufGroup.base[i + 1] = pp - t;
+    }
+    hufGroup.limit[maxLen + 1] = Number.MAX_VALUE; /* Sentinal value for reading next sym. */
+    hufGroup.limit[maxLen] = pp + temp[maxLen] - 1;
+    hufGroup.base[minLen] = 0;
+  }
+  /* We've finished reading and digesting the block header.  Now read this
+     block's huffman coded symbols from the file and undo the huffman coding
+     and run length encoding, saving the result into dbuf[dbufCount++]=uc */
+
+  /* Initialize symbol occurrence counters and symbol Move To Front table */
+  var byteCount = new Uint32Array(256);
+  for (i = 0; i < 256; i++)
+    mtfSymbol[i] = i;
+  /* Loop through compressed symbols. */
+  var runPos = 0, dbufCount = 0, selector = 0, uc;
+  var dbuf = this.dbuf = new Uint32Array(this.dbufSize);
+  symCount = 0;
+  for (;;) {
+    /* Determine which huffman coding group to use. */
+    if (!(symCount--)) {
+      symCount = GROUP_SIZE - 1;
+      if (selector >= nSelectors) { _throw(Err.DATA_ERROR); }
+      hufGroup = groups[selectors[selector++]];
+    }
+    /* Read next huffman-coded symbol. */
+    i = hufGroup.minLen;
+    j = reader.read(i);
+    for (;;i++) {
+      if (i > hufGroup.maxLen) { _throw(Err.DATA_ERROR); }
+      if (j <= hufGroup.limit[i])
+        break;
+      j = (j << 1) | reader.read(1);
+    }
+    /* Huffman decode value to get nextSym (with bounds checking) */
+    j -= hufGroup.base[i];
+    if (j < 0 || j >= MAX_SYMBOLS) { _throw(Err.DATA_ERROR); }
+    var nextSym = hufGroup.permute[j];
+    /* We have now decoded the symbol, which indicates either a new literal
+       byte, or a repeated run of the most recent literal byte.  First,
+       check if nextSym indicates a repeated run, and if so loop collecting
+       how many times to repeat the last literal. */
+    if (nextSym === SYMBOL_RUNA || nextSym === SYMBOL_RUNB) {
+      /* If this is the start of a new run, zero out counter */
+      if (!runPos){
+        runPos = 1;
+        t = 0;
+      }
+      /* Neat trick that saves 1 symbol: instead of or-ing 0 or 1 at
+         each bit position, add 1 or 2 instead.  For example,
+         1011 is 1<<0 + 1<<1 + 2<<2.  1010 is 2<<0 + 2<<1 + 1<<2.
+         You can make any bit pattern that way using 1 less symbol than
+         the basic or 0/1 method (except all bits 0, which would use no
+         symbols, but a run of length 0 doesn't mean anything in this
+         context).  Thus space is saved. */
+      if (nextSym === SYMBOL_RUNA)
+        t += runPos;
+      else
+        t += 2 * runPos;
+      runPos <<= 1;
+      continue;
+    }
+    /* When we hit the first non-run symbol after a run, we now know
+       how many times to repeat the last literal, so append that many
+       copies to our buffer of decoded symbols (dbuf) now.  (The last
+       literal used is the one at the head of the mtfSymbol array.) */
+    if (runPos){
+      runPos = 0;
+      if (dbufCount + t > this.dbufSize) { _throw(Err.DATA_ERROR); }
+      uc = symToByte[mtfSymbol[0]];
+      byteCount[uc] += t;
+      while (t--)
+        dbuf[dbufCount++] = uc;
+    }
+    /* Is this the terminating symbol? */
+    if (nextSym > symTotal)
+      break;
+    /* At this point, nextSym indicates a new literal character.  Subtract
+       one to get the position in the MTF array at which this literal is
+       currently to be found.  (Note that the result can't be -1 or 0,
+       because 0 and 1 are RUNA and RUNB.  But another instance of the
+       first symbol in the mtf array, position 0, would have been handled
+       as part of a run above.  Therefore 1 unused mtf position minus
+       2 non-literal nextSym values equals -1.) */
+    if (dbufCount >= this.dbufSize) { _throw(Err.DATA_ERROR); }
+    i = nextSym - 1;
+    uc = mtf(mtfSymbol, i);
+    uc = symToByte[uc];
+    /* We have our literal byte.  Save it into dbuf. */
+    byteCount[uc]++;
+    dbuf[dbufCount++] = uc;
+  }
+  /* At this point, we've read all the huffman-coded symbols (and repeated
+     runs) for this block from the input stream, and decoded them into the
+     intermediate buffer.  There are dbufCount many decoded bytes in dbuf[].
+     Now undo the Burrows-Wheeler transform on dbuf.
+     See http://dogma.net/markn/articles/bwt/bwt.htm
+  */
+  if (origPointer < 0 || origPointer >= dbufCount) { _throw(Err.DATA_ERROR); }
+  /* Turn byteCount into cumulative occurrence counts of 0 to n-1. */
+  j = 0;
+  for (i = 0; i < 256; i++) {
+    k = j + byteCount[i];
+    byteCount[i] = j;
+    j = k;
+  }
+  /* Figure out what order dbuf would be in if we sorted it. */
+  for (i = 0; i < dbufCount; i++) {
+    uc = dbuf[i] & 0xff;
+    dbuf[byteCount[uc]] |= (i << 8);
+    byteCount[uc]++;
+  }
+  /* Decode first byte by hand to initialize "previous" byte.  Note that it
+     doesn't get output, and if the first three characters are identical
+     it doesn't qualify as a run (hence writeRunCountdown=5). */
+  var pos = 0, current = 0, run = 0;
+  if (dbufCount) {
+    pos = dbuf[origPointer];
+    current = (pos & 0xff);
+    pos >>= 8;
+    run = -1;
+  }
+  this.writePos = pos;
+  this.writeCurrent = current;
+  this.writeCount = dbufCount;
+  this.writeRun = run;
+
+  return true; /* more blocks to come */
+};
+/* Undo burrows-wheeler transform on intermediate buffer to produce output.
+   If start_bunzip was initialized with out_fd=-1, then up to len bytes of
+   data are written to outbuf.  Return value is number of bytes written or
+   error (all errors are negative numbers).  If out_fd!=-1, outbuf and len
+   are ignored, data is written to out_fd and return is RETVAL_OK or error.
+*/
+Bunzip.prototype._read_bunzip = function(outputBuffer, len) {
+    var copies, previous, outbyte;
+    /* james@jamestaylor.org: writeCount goes to -1 when the buffer is fully
+       decoded, which results in this returning RETVAL_LAST_BLOCK, also
+       equal to -1... Confusing, I'm returning 0 here to indicate no
+       bytes written into the buffer */
+  if (this.writeCount < 0) { return 0; }
+
+  var gotcount = 0;
+  var dbuf = this.dbuf, pos = this.writePos, current = this.writeCurrent;
+  var dbufCount = this.writeCount, outputsize = this.outputsize;
+  var run = this.writeRun;
+
+  while (dbufCount) {
+    dbufCount--;
+    previous = current;
+    pos = dbuf[pos];
+    current = pos & 0xff;
+    pos >>= 8;
+    if (run++ === 3){
+      copies = current;
+      outbyte = previous;
+      current = -1;
+    } else {
+      copies = 1;
+      outbyte = current;
+    }
+    this.blockCRC.updateCRCRun(outbyte, copies);
+    while (copies--) {
+      this.outputStream.writeByte(outbyte);
+      this.nextoutput++;
+    }
+    if (current != previous)
+      run = 0;
+  }
+  this.writeCount = dbufCount;
+  // check CRC
+  if (this.blockCRC.getCRC() !== this.targetBlockCRC) {
+    _throw(Err.DATA_ERROR, "Bad block CRC "+
+           "(got "+this.blockCRC.getCRC().toString(16)+
+           " expected "+this.targetBlockCRC.toString(16)+")");
+  }
+  return this.nextoutput;
+};
+
+var coerceInputStream = function(input) {
+  if ('readByte' in input) { return input; }
+  var inputStream = new Stream();
+  inputStream.pos = 0;
+  inputStream.readByte = function() { return input[this.pos++]; };
+  inputStream.seek = function(pos) { this.pos = pos; };
+  inputStream.eof = function() { return this.pos >= input.length; };
+  return inputStream;
+};
+var coerceOutputStream = function(output) {
+  var outputStream = new Stream();
+  var resizeOk = true;
+  if (output) {
+    if (typeof(output)==='number') {
+      outputStream.buffer = new Buffer(output);
+      resizeOk = false;
+    } else if ('writeByte' in output) {
+      return output;
+    } else {
+      outputStream.buffer = output;
+      resizeOk = false;
+    }
+  } else {
+    outputStream.buffer = new Buffer(16384);
+  }
+  outputStream.pos = 0;
+  outputStream.writeByte = function(_byte) {
+    if (resizeOk && this.pos >= this.buffer.length) {
+      var newBuffer = new Buffer(this.buffer.length*2);
+      this.buffer.copy(newBuffer);
+      this.buffer = newBuffer;
+    }
+    this.buffer[this.pos++] = _byte;
+  };
+  outputStream.getBuffer = function() {
+    // trim buffer
+    if (this.pos !== this.buffer.length) {
+      if (!resizeOk)
+        throw new TypeError('outputsize does not match decoded input');
+      var newBuffer = new Buffer(this.pos);
+      this.buffer.copy(newBuffer, 0, 0, this.pos);
+      this.buffer = newBuffer;
+    }
+    return this.buffer;
+  };
+  outputStream._coerced = true;
+  return outputStream;
+};
+
+/* Static helper functions */
+Bunzip.Err = Err;
+// 'input' can be a stream or a buffer
+// 'output' can be a stream or a buffer or a number (buffer size)
+Bunzip.decode = function(input, output, multistream) {
+  // make a stream from a buffer, if necessary
+  var inputStream = coerceInputStream(input);
+  var outputStream = coerceOutputStream(output);
+
+  var bz = new Bunzip(inputStream, outputStream);
+  while (true) {
+    if ('eof' in inputStream && inputStream.eof()) break;
+    if (bz._init_block()) {
+      bz._read_bunzip();
+    } else {
+      var targetStreamCRC = bz.reader.read(32) >>> 0; // (convert to unsigned)
+      if (targetStreamCRC !== bz.streamCRC) {
+        _throw(Err.DATA_ERROR, "Bad stream CRC "+
+               "(got "+bz.streamCRC.toString(16)+
+               " expected "+targetStreamCRC.toString(16)+")");
+      }
+      if (multistream &&
+          'eof' in inputStream &&
+          !inputStream.eof()) {
+        // note that start_bunzip will also resync the bit reader to next byte
+        bz._start_bunzip(inputStream, outputStream);
+      } else break;
+    }
+  }
+  if ('getBuffer' in outputStream)
+    return outputStream.getBuffer();
+};
+Bunzip.decodeBlock = function(input, pos, output) {
+  // make a stream from a buffer, if necessary
+  var inputStream = coerceInputStream(input);
+  var outputStream = coerceOutputStream(output);
+  var bz = new Bunzip(inputStream, outputStream);
+  bz.reader.seek(pos);
+  /* Fill the decode buffer for the block */
+  var moreBlocks = bz._get_next_block();
+  if (moreBlocks) {
+    /* Init the CRC for writing */
+    bz.blockCRC = new CRC32();
+
+    /* Zero this so the current byte from before the seek is not written */
+    bz.writeCopies = 0;
+
+    /* Decompress the block and write to stdout */
+    bz._read_bunzip();
+    // XXX keep writing?
+  }
+  if ('getBuffer' in outputStream)
+    return outputStream.getBuffer();
+};
+/* Reads bzip2 file from stream or buffer `input`, and invoke
+ * `callback(position, size)` once for each bzip2 block,
+ * where position gives the starting position (in *bits*)
+ * and size gives uncompressed size of the block (in *bytes*). */
+Bunzip.table = function(input, callback, multistream) {
+  // make a stream from a buffer, if necessary
+  var inputStream = new Stream();
+  inputStream.delegate = coerceInputStream(input);
+  inputStream.pos = 0;
+  inputStream.readByte = function() {
+    this.pos++;
+    return this.delegate.readByte();
+  };
+  if (inputStream.delegate.eof) {
+    inputStream.eof = inputStream.delegate.eof.bind(inputStream.delegate);
+  }
+  var outputStream = new Stream();
+  outputStream.pos = 0;
+  outputStream.writeByte = function() { this.pos++; };
+
+  var bz = new Bunzip(inputStream, outputStream);
+  var blockSize = bz.dbufSize;
+  while (true) {
+    if ('eof' in inputStream && inputStream.eof()) break;
+
+    var position = inputStream.pos*8 + bz.reader.bitOffset;
+    if (bz.reader.hasByte) { position -= 8; }
+
+    if (bz._init_block()) {
+      var start = outputStream.pos;
+      bz._read_bunzip();
+      callback(position, outputStream.pos - start);
+    } else {
+      var crc = bz.reader.read(32); // (but we ignore the crc)
+      if (multistream &&
+          'eof' in inputStream &&
+          !inputStream.eof()) {
+        // note that start_bunzip will also resync the bit reader to next byte
+        bz._start_bunzip(inputStream, outputStream);
+        console.assert(bz.dbufSize === blockSize,
+                       "shouldn't change block size within multistream file");
+      } else break;
+    }
+  }
+};
+
+Bunzip.Stream = Stream;
+
+Bunzip.version = pjson.version;
+Bunzip.license = pjson.license;
+
+module.exports = Bunzip;
diff --git a/node_modules/seek-bzip/lib/stream.js b/node_modules/seek-bzip/lib/stream.js
new file mode 100644
index 0000000..90f6155
--- /dev/null
+++ b/node_modules/seek-bzip/lib/stream.js
@@ -0,0 +1,42 @@
+/* very simple input/output stream interface */
+var Stream = function() {
+};
+
+// input streams //////////////
+/** Returns the next byte, or -1 for EOF. */
+Stream.prototype.readByte = function() {
+  throw new Error("abstract method readByte() not implemented");
+};
+/** Attempts to fill the buffer; returns number of bytes read, or
+ *  -1 for EOF. */
+Stream.prototype.read = function(buffer, bufOffset, length) {
+  var bytesRead = 0;
+  while (bytesRead < length) {
+    var c = this.readByte();
+    if (c < 0) { // EOF
+      return (bytesRead===0) ? -1 : bytesRead;
+    }
+    buffer[bufOffset++] = c;
+    bytesRead++;
+  }
+  return bytesRead;
+};
+Stream.prototype.seek = function(new_pos) {
+  throw new Error("abstract method seek() not implemented");
+};
+
+// output streams ///////////
+Stream.prototype.writeByte = function(_byte) {
+  throw new Error("abstract method readByte() not implemented");
+};
+Stream.prototype.write = function(buffer, bufOffset, length) {
+  var i;
+  for (i=0; i<length; i++) {
+    this.writeByte(buffer[bufOffset++]);
+  }
+  return length;
+};
+Stream.prototype.flush = function() {
+};
+
+module.exports = Stream;