Updates Hair Sprites

The old sprites were simply inverted, meaning what was supposed to be the highlights showed up as shadows, and vice-versa. What I've done here is simply un-inverted it and fiddled with the levels until they were at a point that the shading variance would be visible to everyone but the blackest of black hair colors.

![hairtest](https://f.cloud.github.com/assets/3828067/2418544/fd793456-ab45-11e3-98cc-f7e75ed95db0.png)