fix typo-related bug

bower.json

@@ -1,7 +1,7 @@
 {
   "name": "unibabel",
   "main": "index.js",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "homepage": "https://github.com/coolaj86/unibabel-js",
   "authors": [
     "AJ ONeal <awesome@coolaj86.com>"

index.js

@@ -36,9 +36,7 @@ function binaryStringToUtf8(binstr) {
 }
 
 function bufferToUtf8(buf) {
-  var binstr = Array.prototype.map.call(buf, function (ch) {
-    return '0x' + String.fromCharCode(ch);
-  }).join('');
+  var binstr = bufferToBinaryString(buf);
 
   return binaryStringToUtf8(binstr);
 }