Write unit tests for services/behaviors

[Morgul]

We need to write unit tests for the testable parts of the client. My thought is to use Mocha directly, since we're a browserify project, we can have our unit tests directly in node, without worrying about karma.

We will need to make our services actually export something, but that shouldn't be terrible. And, provided we unit test the services, a good chunk of our game logic can be unit tested, without worrying about the pain in the ass problems of unit testing UI.