Adding Backbone.JS, Underscore.JS, JQuery and JSON2.

I'm going to use Backbone to have a proper MVC Web UI.
Backbone will work in coordination with the REST API of the game.
The only issue is that I don't have WebSockets, so
I'll have to use good-old-polling.

But for this exercise, it's ok.
First stab at a Backbone model for this Game.

It provides 2 models, Match and Game, and 1 collection, Matches.

Matches collections can be any of the "type" supported
by the API.
Initial, empty welcome page that loads all the dependencies