WIP: Switch to Pako for zlib

This commit introduces an alternate implementation of the zlib
decompressor based on Pako (https://github.com/nodeca/pako).

utils/inflator.partial.js

@@ -0,0 +1,32 @@
+var zlib = require('./lib/zlib/inflate.js');
+var ZStream = require('./lib/zlib/zstream.js');
+
+var Inflate = function () {
+    this.strm = new ZStream();
+    this.chunkSize = 1024 * 10 * 10;
+    this.strm.output = new Uint8Array(this.chunkSize);
+    this.windowBits = 5;
+
+    zlib.inflateInit(this.strm, this.windowBits);
+};
+
+Inflate.prototype = {
+    inflate: function (data, flush) {
+        this.strm.input = data;
+        this.strm.avail_in = this.strm.input.length;
+        this.strm.next_in = 0;
+        this.strm.next_out = 0;
+
+        this.strm.avail_out = this.chunkSize;
+
+        zlib.inflate(this.strm, flush);
+
+        return new Uint8Array(this.strm.output.buffer, 0, this.strm.next_out);
+    },
+
+    reset: function () {
+        zlib.inflateReset(this.strm);
+    }
+};
+
+module.exports = {Inflate: Inflate};