Updating GSAP to 1.10.1

- Fixed issue that could cause the last tween in a TweenMax.staggerTo() not to swap in the tween instance for "{self}" in the onCompleteParams when an onCompleteAll was defined.

- Fixed an issue in AttrPlugin that could cause an error if the starting and ending values of the tween are identical.

- Fixed an issue in CSSPlugin that could cause the scaleZ not to be applied correctly in 3D transforms.

- Added a "force3D" boolean special property for CSSPlugin that, when true, applies a 3D transform which typically causes the browser to promote that element to its own layer on the GPU when possible (this can improve performance).

- Fixed an issue in KineticPlugin that could cause directional rotation values not to work after the first time.

- Changed the behavior of TextPlugin from() tweens so that it is more intuitive in terms of the direction.

- The _addTween() method of TweenPlugin now returns the PropTween instance if one is created (or null if not). This can help optimize some other code.

- Minor optimizations