Pull request for final solution

To Whomever It May Concern,

The following is my pull request for the Connect 4 game. I used the following client side libraries:

* Angular.js
* Underscore.js
* Twitter Bootstrap (for styling and UI components)

I made one slight change to the API code in order to make it consistent with the description in the documentation (changing the POST route to /save/:id as written in the README).

My algorithm code for detecting a Connect 4 situation is poorly written but it took me some time to come up with the algorithm, so I just wanted to quickly get it implemented into the codebase and working properly.

Hope you enjoy playing it!