Blender Git Loki

UI Cleanup: Halo materials and textures
* Textures applied to halo materials showed influence option for normal particles. This was really confusing, and with the cleanup I revealed a couple of hidden features too!
** Particles actually allow for textures to change halo size and hardness, but my guess is that nobody knew since the names were wrong in the ui!
** I also added the option to change the "add" value with a texture, since it was just silly not to have it.
* Halo material properties are also a bit cleaner now.