Added game-saving from home page select form

Changed the homepage select form so now it's a real form that submits
the boxscore ID of the chosen game, and from that a game object is
created. Fucked up the CSS on the submit button I think because it's no
longer an input type "button" but I don't want to mess with Mikey's CSS
because I'll screw it up so Mikey if you could make it look pretty
again that would be great, sorry for messing it up!