Remove gulp cahche

It seems there's an unresoved issue
https://github.com/jgable/gulp-cache/issues/30#issuecomment-54058616

Change-Id: I4837db04bbdc859c1298fb38ee3410808e540b21
Add jquery ui to bower for easing

I guess this was always missing

Change-Id: Ia0ca3751027f508365957cbf59369cf95ce438f6