Also slow down the beginTime for tweens when simulator slow motion is…

… enabled.

Reviewers: O2 Material Motion, O4 Material Apple platform reviewers, #material_motion, markwei

Reviewed By: O2 Material Motion, O4 Material Apple platform reviewers, #material_motion, markwei

Tags: #material_motion

Differential Revision: http://codereview.cc/D3219

src/reactivetypes/Reactive+CALayer.swift

@@ -154,6 +154,7 @@ extension Reactive where O: CALayer {
         let animation = info.animation.copy() as! CAPropertyAnimation
 
         animation.duration *= TimeInterval(simulatorDragCoefficient())
+        animation.beginTime *= TimeInterval(simulatorDragCoefficient())
 
         if layer.speed == 0, let lastTimelineState = layer.lastTimelineState {
           animation.beginTime = TimeInterval(lastTimelineState.beginTime) + animation.beginTime