Remove unnecessary and redundant nested layouts, fix the alignment of
the unlock button to the right edge of the screen, use cleaner margins
and replace the deprecated fill_parent sizes with match_parent.
Look like an Android app from 2013.
Remove the redundant Gingerbread button styles from buttons to
automatically use the Holo theme on phones that don't run a 3+ year old
operating system.
Create a new style for horizontal progress bars that uses the Holo
progress bar style on v11 and above.
1) Update the create, prompt, and change passphrase activities.
They are no longer dialog themed, and should look a little
less ugly.
2) Update the import DB activity to be less ugly and more robust.
3) Abstract all of the state handling stuff out of
ConversationListActivity. This is now handled by RoutingActivity,
which all launch intents move through.
1) Change all instances which use concatenation to build strings
with variables in them to use string formatting instead.
2) Extract all string literals from layouts and menus into strings.xml
3) Extract all string literals from code into strings.xml
