Add a functionality to stream animations to the LED cube engine instead of internally rendering them.

[LimpSquid]

It would be nice to be able to stream animations directly to the LED cube engine. One advantage will be that we are able offload the animation rendering part. Secondly we could use a more suitable programming language for rendering animations. For example we could make an animation renderer in Python, that way we do not need to recompile the application every time we wan to try out new animations. Also, this python animation renderer doesn't have to run on the RPi of the LED cube, but can simply be ran on my personal computer. These benefits are quite welcome as it makes designing and implementing new animations way easier for me.