Offline Use Integration

Ok so I tested this on the browser and in mobile and everything is working properly. Here were the changes:
1. Added AngularCRUD-Firebase.appcache
2. Added online / offline event listeners
3. Added dataFactory to services.js
4. Added forageFactory to services.js
5. Added restFireService to services.js (REST version of fireService)
6 Added updateAllContacts function to the end of fireService (brute force contacts update - deletes them all and replaces them with the localForage contacts).