SpriteList: Allow draw() with specific sprite count and offset

[einarf]

We should allow users to draw a spritelist with a specific count and offset.

def draw(self, count: int: -1, offset: int =0):
    pass

This is faster than contstantly rebuilding the spritelist.

While we are at it: Also remove the deprecated texture transform uniform setter.

[einarf]

Still debating if this is a good idea. It can cause a lot of confusion with collision and so on.