Change Goated Message

Change "already goated" message to make it easier to understand
Merge pull request #36 from reap3r119/patch-1

Change Goated Message
Added a timer for joining the game. (issue #20)

- Usage: set a non-zero value for var.JOIN_TIMER_LIMIT in seconds
- Added kill_join() to handle game cancellations
- Join timers set on first join and canceled if everybody quits or when a
  game starts