Refactor: wait_until_sound_end

Moved function wait_until_sound_end from Controller to AudioPlayer.
Update: intro.py

Changed fps_goal to fpsGoal, as the former violated naming convention.
Update: GameData.winners

Now returns tuple(s) of (player #, player name).
Update: JeopGameState

Removed unused CLICKABLE state range.
Update: Post-game congrats message implemented
Docs update: Todo