Sombrero(s) + Ponchos

Adds three sombreros to the code, three ponchos, and Ian can now wear the classic sombrero. One is vend-able at the autodrobe, and the other is admin-spawnable, since, like golem clothing, you're unable to take it off yourself.

UPDATE:
Classic Sumbrero has been added!
Ponchos and Ian update! 
![ian sombrero](https://f.cloud.github.com/assets/5836184/2302040/5635bea2-a169-11e3-8811-e26279314c1c.png)


Thanks to MattyQ for the sprites
![ponchos](https://f.cloud.github.com/assets/5836184/2302037/4e2732ea-a169-11e3-8404-9d93e4c62df5.png)
![sombrero](https://f.cloud.github.com/assets/5836184/2251784/9c837b96-9da0-11e3-8f97-8e3b9c33ddcb.png)
![sombrero](https://f.cloud.github.com/assets/5836184/2251788/a4bb9028-9da0-11e3-8d6e-b51a81e33655.png)
![greensombrero](https://f.cloud.github.com/assets/5836184/2250639/766647e4-9d92-11e3-8587-22ff37239521.png)
![shamebrero](https://f.cloud.github.com/assets/5836184/2250640/7a51b1d6-9d92-11e3-9760-11f752503d24.png)
![greensombrero1](https://f.cloud.github.com/assets/5836184/2250643/7cf3b70e-9d92-11e3-9ffb-678cdc191c74.png)
![shamebrero1](https://f.cloud.github.com/assets/5836184/2250644/802c7118-9d92-11e3-9322-4fe514644f61.png)
![shamebrero-onperson](https://f.cloud.github.com/assets/5836184/2250646/83a6a606-9d92-11e3-9d3d-ed73135b13e4.png)