modify demos

Author: ZhenfeiNie

Diff for: asq-exercise.html

@@ -78,9 +78,7 @@
           <content></content>
         </div>
         <footer horizontal end-justified layout>
-          <div>
-            <b>{{status}}</b>
-          </div>
+          <!-- <div><b>{{status}}</b></div> -->
           <div>
             <template if="{{confidence}}">
             <asq-confidence id="confidence"></asq-confidence>
@@ -104,7 +102,7 @@
           <content></content>
         </div>
         <footer horizontal end-justified layout>
-          <div>
+          <div vertical layout end>
             <asq-progress value="{{submissionsNum}}" max="{{connectedViewersNum}}"></asq-progress>
             <paper-button id="stats" class="submit-button" raised="true">Stats</paper-button>
           </div>

Diff for: demo.html

@@ -294,7 +294,7 @@
       <asq-code mode="java">
       <asq-stem><h4>Implement quick sort algorithm in Java</h4></asq-stem>
       <code>public class Main { 
-    public static void main(String args) {
+    public static void main(String args[]) {
 
     }
 } </code>