Export new GUI

scratch-gui exports `index.js` instead of just GUI container.

src/containers/gui.jsx

@@ -24,12 +24,13 @@ class GUI extends React.Component {
     constructor (props) {
         super(props);
         this.state = {
-            loading: true,
+            loading: !props.vm.initialized,
             loadingError: false,
             errorMessage: ''
         };
     }
     componentDidMount () {
+        if (this.props.vm.initialized) return;
         this.audioEngine = new AudioEngine();
         this.props.vm.attachAudioEngine(this.audioEngine);
         this.props.vm.loadProject(this.props.projectData)
@@ -44,6 +45,7 @@ class GUI extends React.Component {
                 // error page gets rendered if project failed to load
                 this.setState({loadingError: true, errorMessage: e});
             });
+        this.props.vm.initialized = true;
     }
     componentWillReceiveProps (nextProps) {
         if (this.props.projectData !== nextProps.projectData) {

src/index.js

@@ -0,0 +1,28 @@
+import GUI from './containers/gui.jsx';
+import GuiReducer, {guiInitialState, initFullScreen, initPlayer} from './reducers/gui';
+import {ScratchPaintReducer} from 'scratch-paint';
+import IntlReducer from './reducers/intl';
+import {setFullScreen, setPlayer} from './reducers/mode';
+import {setAppElement} from 'react-modal';
+import {applyMiddleware, compose} from 'redux';
+import throttle from 'redux-throttle';
+
+const guiReducers = {
+    intl: IntlReducer,
+    scratchGui: GuiReducer,
+    scratchPaint: ScratchPaintReducer
+};
+
+const guiMiddleware = compose(applyMiddleware(throttle(300, {leading: true, trailing: true})));
+
+export {
+    GUI as default,
+    setAppElement,
+    guiReducers,
+    guiInitialState,
+    guiMiddleware,
+    initPlayer,
+    initFullScreen,
+    setFullScreen,
+    setPlayer
+};

webpack.config.js

@@ -166,7 +166,7 @@ module.exports = [
         defaultsDeep({}, base, {
             target: 'web',
             entry: {
-                'scratch-gui': './src/containers/gui.jsx'
+                'scratch-gui': './src/index.js'
             },
             output: {
                 libraryTarget: 'umd',
@@ -179,7 +179,6 @@ module.exports = [
             module: {
                 rules: base.module.rules.concat([
                     {
-                      
                         test: /\.(svg|png|wav|gif|jpg)$/,
                         loader: 'file-loader',
                         options: {