* rename Zoe to have an ascii name
* now that all button names are ascii, make a regexp for valid button names, and check against it in createGame
* don't use the word beta
Merge pull request #686 from cgolubi1/159_zoe_ascii

rename Zoe to have an ascii name and check button names against a regexp
Merge pull request #688 from cgolubi1/671_front_page_beta_fix

* don't use the word beta