TextListComponent::isScrolling() now only returns true if the key has been
held down long enough for scrolling to really start.
Fixed opacity for RatingComponent and DateTimeComponent.
Exposed some more of AnimationController.
Added LambdaAnimation (which lets you use a lambda for the apply method).
Useful for simple one-off animations.
Added animation slots - only one animation can play per slot. This way
you can have two animations run at the same time.