Added Protection from the global scope

this protects the code inside from 

* window = null; //etc

also the undefined means they can't chain more variables on

dist/julius.js

@@ -1,4 +1,4 @@
-(function() {
+(function(window, navigator, undefined) {
     var postBuffer = function() {
       var that = this;
 
@@ -119,4 +119,4 @@
     };
 
     window.Julius = Julius;
-}() );
+}(window,window.navigator) );