Add demoURL for emberaddons.com

Author: Gaurav0

package.json

@@ -2,7 +2,6 @@
   "name": "ember-cli-jquery-ui",
   "description": "A simple addon to add jquery-ui as a dependency to your app. Also includes a small library of components wrapping JQuery UI widgets.",
   "version": "0.0.17",
-  "exampleAppUrl": "http://ember-cli-jquery-ui-example.herokuapp.com/",
   "directories": {
     "doc": "doc",
     "test": "tests"
@@ -43,6 +42,7 @@
     "jquery-ui"
   ],
   "ember-addon": {
-    "configPath": "tests/dummy/config"
+    "configPath": "tests/dummy/config",
+    "demoURL": "http://ember-cli-jquery-ui-example.herokuapp.com/"
   }
 }