Add preferences activity

Change-Id: I29a1423477269f6594ddb4631bd7b261475072ea
WhisherPush: NL translation

Change-Id: I99806496e5b546d98049799cc0caacb512010c8c
Allow registration to be started from service

This will allow us to integrate WhisperPush registration with the
CMAccount setup wizard.

Change-Id: I6e974aa08b439c769411a6a8f6112eda9ab087bf
Notify user of new incoming sessions

Change-Id: I8a2162b22b62910a096593beba5c7d7b8721c4cd
Clean up preferences

Switch to Holo
Add "View my identity key" preference

Change-Id: Ia41b342543844af714153b76b8cf84f327d73b03
Fix crash when reinstantiating preference fragment

The framework expects an empty constructor, and really, I should have
been using getActivity() all along.

Change-Id: I4db0c69a003b64c856fe1ededa19091094923bfd
Merge "Allow registration to be started from service" into cm-11.0
Merge "Notify user of new incoming sessions" into cm-11.0
Merge "Clean up preferences" into cm-11.0
Merge "WhisherPush: NL translation" into cm-11.0
WhisperPush: Initial DE translation

PS6:    Renamed again after Transifex drop

Change-Id: I6b3028d2c097ee7d90eb7e642126a86a28f6c9bd
WhisperPush: NL translation

ps1: Allow registration to be started from service

ps2: Notify user of new incoming sessions

ps3: Clean up preferences

Change-Id: If9add48678685050d8d20fa823308f097501e6b9
WhisperPush: DA translation

Change-Id: I3d98a73f72c30459ac05aa0d4f3478854c8992d4
Merge "WhisperPush: DA translation" into cm-11.0
WhisperPush: ES translations

Change-Id: I1282d4da310f2bee9d5666db902415b5989cb24d