Update module name.

GAE requires first upload module to be named 'default'.
Add jQuery v2.1.1.
Fix typo.
Add sidebar navigation and dashboard function.

1. Create GCM app configuration in dashboard. After creation, the app
   will be listed on the left sidebar
2. Add alert message to display app creation result.
3. Remember alert manually dismission by user.
4. Add jQuery plugin: cookie v1.4.1
Check urlsafe key validation.

But not use it right now.
Check this issue, https://code.google.com/p/appengine-ndb-experiment/issues/detail?id=143
Show app configuration in panel.
list devices (only most recently 100) for each gcm app.