Updated Closure Compiler, fixed some constant inlining problems, and turned PREFETCH off for now

modules/pcjs/lib/defines.js

@@ -57,7 +57,7 @@ var DEBUGGER = true;            // this @define is overridden by the Closure Com
  *
  * PREFETCH enables the use of a prefetch queue.
  */
-var PREFETCH = true;
+var PREFETCH = false;
 
 /**
  * @define {boolean}