* use BMSkill, BMDie, and BMButton to determine which buttons have
  unimplemented skills, and grey these buttons out in the UI with
  a warning to testers
* prefix unimplemented buttons with -- to work with browsers that
  don't respect CSS in dropdowns.  also make the grey a little lighter
Merge branch 'master' of github.com:buttonmen-dev/buttonmen into tkt-125
Merge branch 'master' of github.com:buttonmen-dev/buttonmen into tkt-125
Merge pull request #157 from cgolubi1/tkt-125

create game UI greys out buttons with unimplemented skills