Added % switch and %-based translate
Added % switch and %-based translate

Allow flipsnap to get real-time measurements of elements before applying transform, and use %-based calculations based on ratio of how many items are in each 'flip' vs. how many items there are total. See comments for example.
babatakao/js-flipsnap,dongtong/js-flipsnap,loki315zx/js-flipsnap,hokaccha/js-flipsnap,dongtong/js-flipsnap,hokaccha/js-flipsnap,loki315zx/js-flipsnap,ShootProof/js-flipsnap,yuanzhaohao/js-flipsnap,babatakao/js-flipsnap,ShootProof/js-flipsnap,yuanzhaohao/js-flipsnap