Let SplashScreen trigger render of App

The splash screen will soon poll for loading progress info, so we might as well
launch App directly from SplashScreen instead of having two separate polls.

js/component/splash.js

@@ -15,6 +15,10 @@ var splashStyle = {
 var SplashScreen = React.createClass({
   propTypes: {
     message: React.PropTypes.string,
+    onLoadDone: React.PropTypes.func,
+  },
+  componentDidMount: function() {
+    lbry.connect(this.props.onLoadDone);
   },
   render: function() {
     var imgSrc = lbry.imagePath('lbry-white-485x160.png');

js/main.js

@@ -3,13 +3,11 @@ var init = function() {
   var canvas = document.getElementById('canvas');
 
   ReactDOM.render(
-    <SplashScreen message="Connecting"/>,
+    <SplashScreen message="Connecting" onLoadDone={function() {
+      ReactDOM.render(<App/>, canvas);
+    }}/>,
     canvas
   );
-
-  lbry.connect(function() {
-    ReactDOM.render(<App/>, canvas);
-  })
 };
 
 init();