started working to integrate vm and site

public/vm/byte-stream.js

@@ -0,0 +1,39 @@
+var ByteStream = function (byte_array) {
+    console.log("Instance created.");
+    this.byte_array = byte_array;
+    this.index = 0;
+};
+
+ByteStream.prototype.get_u1 = function() {
+    var result = this.byte_array[this.index];
+    this.index += 1;
+    return result;
+}
+
+ByteStream.prototype.get_u2 = function() {
+    var high = this.get_u1();
+    var low = this.get_u1();
+    return (high << 8) + low;
+}
+
+ByteStream.prototype.get_u4 = function() {
+    var high = this.get_u2();
+    var low = this.get_u2();
+    return (high * 0x10000) + low;
+}
+
+ByteStream.prototype.get_i4 = function() {
+    var unsigned_val = this.get_u4();
+    var sign_mult = (unsigned_val & 0x80000000) ? -1 : 1;
+    return (unsigned_val & 0x7FFFFFFF) * sign_mult;
+}
+
+ByteStream.prototype.get_bytes = function(n) {
+    var result = [];
+    for (var i = 0; i < n; i++) {
+        result.push(this.get_u1());
+    }
+    return result;
+}
+
+exports.ByteStream = ByteStream;