fixed a lot of ActionBarSherlock => AppCompat issues

(still more to go though!)
renamed "settings" package to "preferences"
some cleanup in MainActivity
moved location of ImageLoader from Utilities to App
moved location of global app base log tag
fixed log tag references in gcm package
small documentation change in ApiData class
fixed log tag usages in server package
fixed log tag issue in GamesListFragment
fixed a bunch of ActionBarSherlock => AppCompat issues in FriendsListFragment
fixed more log tag issues
removed some uesless comments
changed how ImageLoader is used in GameOverActivity
small comment update for ListItem class
removed StyledString class as its no longer necessary
small refactoring to Typefaces class
left off final modifier from App class's BASE_TAG!
fixed how ImageLoader is accessed in ConfirmGameFragment
removed some PreferenceActivity junk that will need to be reworked
fixed how log tag is accessed in BoardView class