week/:week_number now returns all games of associated week

adds game factory
refactors greeting into its own MVC
picker now displays games of associated week

week is currently hardcoded
Adds pick model to represent a user's pick for a week

week value is baked into game id.
adds relevant association helpers
post /picks now creates a pick

associational data passed along in body for ease
of use in JS.
user can now make a pick

alters game format to make request simple
picking controller now prevents duplication
Merge pull request #4 from raorao/game-picker

Game picker