Add mention of the image anchor affecting rotation in the sprite rotation property.
Add mention of the image anchor affecting rotation in the sprite rotation
property.

mammadori/pyglet,theblacklion/pyglet,oktayacikalin/pyglet,oktayacikalin/pyglet,mammadori/pyglet,mammadori/pyglet,theblacklion/pyglet,theblacklion/pyglet,oktayacikalin/pyglet,oktayacikalin/pyglet,theblacklion/pyglet,oktayacikalin/pyglet,theblacklion/pyglet,mammadori/pyglet