newest work: finally got sprites to work with legs

Basically, I have 3 points in the leg: the anchor, the knee, and the foot. Before, the legs didn't rely on the points' rotation, just distance constraints. Now, I made it so the anchor rotates toward the knee, and the knee rotates toward the foot. Then I just replaced the points with bone-sprites, and it works!

The reason it didn't work until now was that the angle constraints on the legs were buggy, and the sprites ignored the constraints, meaning that they could just spin around freely.