Add the ability to draw a sub-section of a spritelist

[DragonMoffon]

Gl geometry can draw a specific number of vertices independent of the internal buffer size. Adding a new draw method to Spritelists that opens this to developers would benefit optimisation.

[einarf]

We had this in a branch at some point but it made the draw method very cluttered. Likely we can just make a draw_range(..) alternative here. This is a relatively quick thing to add.