added unit test and code coverage for Javascript Code Base

Hi Sir, my name is Sy from Yahoo. I put together a simple set of unit test for your AngularJS code. Please refer to the read me for detail of how to install them.

Framework
-Karma, Qunit, Grunt and NodeJs. 
-Angular Mock
-Sinon JS for spying objects

Prerequisite:
-install node js (http://nodejs.org/)
-sudo npm install -g grunt-cli
-sudo chown -R syle ~/.npm/
-npm install


To run the test:
-npm test


If you have any question at all, feel free to reach out to me at syle@yahoo-inc.com

Thanks,
Sy