Animation bug when frames = 1
BezierProfile and CompoundProfile from Animations, and a test of all the new profiles.
Improvements to the SceneDesigner
Created RGBABox, and fixed a bug which prevented a Property to have its value set to null.
SceneDesigner Copy,Paste,Cut
IntegerBox can adjust values using up/down pageup/pgdown
DoubleBox can adjust values using Up/Down PageUp/PageDown keys.
F8 to edit an actor's text in the scene designer. Needed extra ensureVisible on Container.
So now ensureVisible isn't unique to VerticalScroll, so there is no need for the Scrollable interface.
Many improvements while creating iThrust, include new CubicSpline class,
actors are now all initialise after all actors are added to the layers.
Last commit before trying out LWJGL.