Change app theme to Holo.Light
Extract Utils.Tuple to separate class
Update a lot of things

* Remove SendMessageFragment. Reuse MessageActivity instead
* Add character count to MessageActivity
Major UI improvements
Rename prefs.xml -> card.xml and use CapWords for name

Add android:inputType="textCapWords" for name pref.
Remove Cancel button from progress dialog
Use AlertDialog in LoginFragment
Use card style in WriteTagActivity
Fix issue with auth tokens never being saved.

Needed the editor to .commit() after editing preferences.