renames server Game._sendToAll to _sendToAllUsers
refactors Result and adds FIXME for Result.details - needs refactoring
refactors Result - adds placeholders for result descriptions.

removes summary and getSummary - "tally" (e.g. 1-0) will be used as the summary

e.g. result.getTally()+"\n"+result.getDescription()

1-0
gus won by checkmate
uncomments and rewrites _gameOver calls in Game.move