Added ActionBarSherlock submodule
First bulk porting of the settings

Includes some stuff such as sync settings and Analytics that @frapontillo will use to hook up his code to.
Updated ABS ref
Huge step forward towards #5 completion. Still missing Analytics and Sync interval wirings, plus "refresh now" preference item.
Another big bunch of Settings stuff done.

Getting closer to finishing #5!
 - Closed #13, "refresh now" in settings
 - Found the likely cause of at least one form of #8: the temperature is shown, the main text still complains about the lack of weather data (there was an x == y && x == z, shoulda've been an || instead)
 - Added proper handling of stuff with the settings activity, and added a DashClock-like DONE button to the ActionBar
 - Finished polishing the Authors dialog
 - A few things here and there
Added Analytics keys file to ignore list
Added some preferences to UI (still no code behind them)
Finished all the settings activity requirements

Closes #5
Added Android-switch-backport submodule
Added all the settings listed
Fixed submod ref
Possible fix for #8
Finish 5-setting