games can be created in console
Merge branch 'master' into game-setup
added pry
added new game form
users can create games
new games register current user as their creator
creating a game leads to game page
players can be created
game creator joins came on game creation
users can join games
players cant join a full game
join game button does not appear if game is full
cleaned up Game#add_player code
player cant join game if already in game