r272 - Music Block, 3d Grass, and Rat

This version adds in the music block, 3d grass, and rat.  The rat sounds aren't final yet and I probably need to adjust its health.

No Maps - http://www.mediafire.com/?g9befd02m5w1vgd
With Maps - http://www.mediafire.com/?ef0gq3ijdgd0dg4