Better fit for all screen sizes. Built with latest Android libraries.

Fixed problem of disappearing dominoes and crashes.

1. Added ability to listen to music from a different app while playing this game.
2. Added an option to make double-zero worth zero points. Now can be 0, 25, or 50. (Menu->Options).
3. Fixed a bug causing game to freeze.
4. Other minor bug fixes.

Moved dominoes up slightly so then don't cover the lower swipe bar. Made change which should reduce or eliminate freezes.

1. Fixed crashing
2. Added sound volume control
3. Was not properly handling tie games. Fixed.
4. Gave user a visual indication of which doubles have been played for each hand.

Fixed problems with iOS 13.1

Fixed a bug where dominoes sometimes disappeared.
Fixed a problem where dominoes would sometimes flip end-for-end, when I didn't want them to.