Transition edits and updates

Changed the format for multipliers from <prop>[, <prop>]* to the new <prop># syntax.

removed 'clip' and 'rectangle' as animatable property as 'clip' has been deprecated.

added the beginnings of 'transform' as an animatable property. How 'transform' undergoes transition needs to be updated (not included in pull as I don't know the best syntax for this edit)