Update viewmodel.js

Allow passing false to constructor to bypass compilation. Add vue.init( config) to defer setting configuration after construction has completed.

src/viewmodel.js

@@ -16,7 +16,8 @@ var Compiler   = require('./compiler'),
  *  and a few reserved methods
  */
 function ViewModel (options) {
-    // just compile. options are passed directly to compiler
+    // compile if options passed, if false return. options are passed directly to compiler
+    if( options === false ) return;
     new Compiler(this, options)
 }
 
@@ -24,6 +25,14 @@ function ViewModel (options) {
 // so it can be stringified/looped through as raw data
 var VMProto = ViewModel.prototype
 
+/**
+ *  init allows config compilation after instantiation
+ *  var a = new Vue(false); a.init( config );
+ */
+def(VMProto, 'init', function (options) {
+    new Compiler( this, options )
+})
+
 /**
  *  Convenience function to get a value from
  *  a keypath
@@ -177,4 +186,4 @@ function query (el) {
         : el
 }
 
-module.exports = ViewModel
+module.exports = ViewModel