CheckBox: added will-change + remove event listener on unmount
CircleShadow: added will-change
Dialog: implemented (and smooth animating on mobile)
FloatingActionButton: now using shadow component
Overlay: make it possible to create an overlay on which you can't click (why?!)
RadioButton: add will-change
RadioButtonGroup: add keys
RippleContainer - click event now contains details
Shadow: add will change
Subheader - implemented (but useful?!)
Tab title - now has ripplecontainer
ToggleButton - add will-change

Some non relevant changes to views.
Merge pull request #53 from SanderSpies/sspi-work-in-progress

CheckBox: added will-change + remove event listener on unmount