attempting to craft the onReady bit...I think this works?

Signed-off-by: VoR0220 <catalanor0220@gmail.com>

js/embark.js

@@ -1,4 +1,6 @@
-var EmbarkJS = {};
+var EmbarkJS = {
+  onReady: __embarkContext.execWhenReady
+};
 
 EmbarkJS.isNewWeb3 = function() {
   var _web3 = new Web3();

templates/demo/app/dapp.js

@@ -21,7 +21,7 @@ class App extends React.Component {
   }
 
   componentDidMount(){ 
-    __embarkContext.execWhenReady(() => {
+    EmbarkJS.onReady(() => {
       if (EmbarkJS.isNewWeb3()) {
         EmbarkJS.Messages.Providers.whisper.getWhisperVersion((err, version) => { 
           if(!err)