Changes for 2.0.15

• Link JumpOver fixes.
• Fixed an animation bug where some Model loading events might not respect the value of AnimationManager.isInitial.
• Fixed a bug with AnimationManager.isInitial, where subsequent animations may not occur when it is false.
• Fixed a bug with Picture drawing when the Picture is scaled to be drawn smaller than a pixel. During expanding animations, it is possible that such a small scale is applied to a Picture.