export tutorial initialization for www

Export the tutorial card URL query string handling for www.
Also fix typo

src/index.js

 import GUI from './containers/gui.jsx';
 import AppStateHOC from './lib/app-state-hoc.jsx';
-import GuiReducer, {guiInitialState, guiMiddleware, initFullScreen, initPlayer} from './reducers/gui';
+import {detectTutorialId} from './lib/tutorial-from-url';
+import GuiReducer, {guiInitialState, guiMiddleware, initFullScreen, initPlayer, initTutorialCard} from './reducers/gui';
 import LocalesReducer, {localesInitialState, initLocale} from './reducers/locales';
 import {ScratchPaintReducer} from 'scratch-paint';
 import {setFullScreen, setPlayer} from './reducers/mode';
@@ -24,5 +25,7 @@ export {
     initLocale,
     localesInitialState,
     setFullScreen,
-    setPlayer
+    setPlayer,
+    detectTutorialId,
+    initTutorialCard
 };

src/lib/app-state-hoc.jsx

@@ -70,7 +70,7 @@ const AppStateHOC = function (WrappedComponent, localesOnly) {
                     if (tutorialId !== null) {
                         // When loading a tutorial from the URL,
                         // load w/o preview modal
-                        // open requested tutorial card or tutorials mocal for 'all'
+                        // open requested tutorial card or tutorials library modal for 'all'
                         if (tutorialId === 'all') {
                             initializedGui = initTutorialLibrary(initializedGui);
                         } else {