Support more game systems

[trevorld]

• alquerque bits and boards
• dominoes_chinese and dominoes_chinese_black dice
• dominoes_chinese and dominoes_chinese_black dominoes
• Better support for "black" dice / dominoes with "Game Bit" fonts
• meeples bits
• marbles bits and boards
• morris bits and boards
• reversi bits and boards

[trevorld]

• https://stackoverflow.com/questions/56540160/why-isnt-there-a-medium-small-black-circle-in-unicode gives a list of the eight different Unicode black circles sorted by size
• marbles has nine different sizes so we may need to bin them
• May not be distinguishable from go stones