Made new assets, Intel, Spade and Grenade.

Didn't like the old PMF models, so I decided to create some. 
This should satisfy Issue #11 
Pictures:

Intel and Spade:
![Intel and Spade](https://f.cloud.github.com/assets/605854/726348/4e612a6e-e0ed-11e2-8936-af1e1599de50.jpg)


Grenade:
![Grenade](https://f.cloud.github.com/assets/605854/726347/3f46e690-e0ed-11e2-84a5-475bcadee608.jpg)