Fix some Erudite stuff

Some things didn't quite work, like power points and bonus feats; I copied the power points stuff from the psion class, since it's the same, and removed the redundant Knowledge (Psionics) class skill. (It's redundant because they get all Knowledge skills anyway.) I'm not sure if I caught everything that wasn't right.

I'm on 6.00.01 and primarily using the RSRD, in case that makes a difference for some reason.