#117: Added request with gcm token to backend at login
Merge branch 'app/cloudmessaging' of https://github.com/just-kile/Zapfmaster2000 into app/cloudmessaging
#117: Added reset gcm token on logout
Merge branch 'app/cloudmessaging' of https://github.com/just-kile/Zapfmaster2000 into app/cloudmessaging
Merge branch 'app/cloudmessaging' of https://github.com/just-kile/Zapfmaster2000 into app/cloudmessaging
Merge branch 'app/cloudmessaging' of https://github.com/just-kile/Zapfmaster2000 into app/cloudmessaging
Merge branch 'app/cloudmessaging' of https://github.com/just-kile/Zapfmaster2000 into app/cloudmessaging
#117: Fixed JSON for gcm