Adjusted arrow sizes

Trying to avoid the app clipping in both portrait and landscape, for any
size device.
Removed warning

Yes it's unorthodox but I don't like that you can't set the text size using
dp when it makes sense.
Format police
Converted to support library and fragments

For backwards compatibility purposes
Use internal rotation for ArrowView

It's faster, but more importantly it will be backwards compatible
Made project support API 7+

Still need to do MorePlayersDialogFragment, but that is a bit more
involved than the rest.
Made MorePlayers DF back compat
Bumped version number