gamma_build_13 release

renamed code packages to reflect release package
Added user highlighting, configure it in settings (highlighted users
currently are not saved when backing up settings)
Added hex color entry on color picker dialogs
Added optional confirmation dialogs to post submission and cancel,
enable them in settings
Changed default sig to "Posted with GameRaven *grver*"
Updated HoloEverywhere, ActionBarSherlock libraries
Fixed bug where latest post used for notifications was not getting
updated when viewing AMP list