nicolaschengdev/WYPopoverController — pull request #99 by ksjun (2014-04-15 05:43:16+00:00)
Title: add `animationDampingRatio` property.

This value is used at `[UIView animateWithDuration:delay:usingSpringWithDamping:initialSpringVelocity:options:animations:completion:`
Default value is 1.0f and no spring damping is animated.

The 'T' button of demo application has 0.7f to show spring damping animation.