Bugfix/multi choice carousel

This fixes the mult-choice component, which animates via th-carousel.

Also added two attributes to th-carousel: 
- animateOn (options are: tap, interval, or none)
- interval (takes an integer to determine the time between panel when animateOn is set to 'interval')

a little bit too late (already done the merge), but for the record, if animateOn is either 'tap' or nothing, why not change it to animateOnTap and let it accept a boolean?