Matt Perry e92dfcfbbc Fix common asserts in animation API.
1. We would assert if you tried to start an animation from within an
animation status callback. This is a common pattern, so I fixed this
assert (in Ticker._tick).
2. We would assert for animations with duration under a millisecond.
Fixed.

Also removed the workarounds assocated with #1.
2015-08-13 13:18:25 -04:00
..
2015-08-13 13:18:25 -04:00
2015-08-12 14:32:13 -07:00