Cleanup

Removed commented-out code
Removed unused code
Reformatted code to match style settings more closely
Removed unused resources
Removed old copyright notices from files which have had their original content completely removed
Support google authenticator logins
Refactor login activity into 3 files

Also ensure correct text fields are focused when the views are displayed
Support trusting the android device
Add 'remember email' checkbox
Make passwords for the current domain (if any) appear above other entries