Removed trailing commas
Fixed locales and labels

Fixed locales for Courses and Messages sections.
Smaller lables for Library section.
Updated the button names inside the Messages section.
Corrected title inside en.json file
Upgraded to sencha 2.4.1
PUSH service registration by using a unique app id

The unique app id is generated by this cordova plugin:
https://github.com/Paldom/UniqueDeviceID.git