Added karma tests to grunt
Added karma tests to grunt

AndreasZeissner/angular-charts,gajdusek-egston/angular-charts,lakhansamani/angular-charts,anthonyhplo/angular-charts,chinmaymk/angular-charts,471685249/angular-charts,chinmaymk/angular-charts,anthonyhplo/angular-charts,AntonNarkevich/angular-charts,lakhansamani/angular-charts,471685249/angular-charts,gajdusek-egston/angular-charts,AntonNarkevich/angular-charts,AndreasZeissner/angular-charts