easing: Added enum with all supported functions.
easing: Added enum with all supported functions.

bkaradzic/bx,pigpigyyy/bx,MikePopoloski/bx,septag/bx,fluffyfreak/bx,mmicko/bx,attilaz/bx,coconutxin/bx,attilaz/bx,mmicko/bx,fluffyfreak/bx,0-wiz-0/bx,MikePopoloski/bx,bkaradzic/bx,coconutxin/bx,pigpigyyy/bx,0-wiz-0/bx,septag/bx