adds tween and easing classes (with algorithms from Robert Penner) to handle animation
adds tween and easing classes (with algorithms from Robert Penner) to handle animation

git-svn-id: 86a4f41f9d0383640198789122b520d4105b319a@6097 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

Turbo87/mergejs.py