NodeSprite

[JirkaDellOro]

I moved the NodeSprite and SpriteAnimation to FudgeAid and did some work on it to create a first version for testing

• see https://github.com/JirkaDellOro/Prima/tree/master/L12_Plattformer2D
• the handling of the textures is done self sufficient in the Hare's superclass NodeSprite
• done via Timer, other solutions are possible, more testing will show reveal the necessity
• note that one frame of the IDLE-animation takes more time. NodeSprite has an attribute framerate, but individual frames can scale the time to show.