Add CSS link reference in Project Integration
Add CSS link reference in Project Integration

Closes #180
kddc/angularjs-slider,denisos/angularjs-slider,rzajac/angularjs-slider,denisos/angularjs-slider,rzajac/angularjs-slider,angular-slider/angularjs-slider,angular-slider/angularjs-slider,andreytkachenko/angularjs-slider,TimmyParkwayd/angularjs-slider-touch,andreytkachenko/angularjs-slider,TimmyParkwayd/angularjs-slider-touch,kddc/angularjs-slider