Bananium powered clown shoes

These shoes spit out special banana peels that disappear once they do their job. 

Powered by bananium.

![bananasprites](https://cloud.githubusercontent.com/assets/4951579/4819316/dce34762-5f00-11e4-8377-fd9a71221e5d.gif)

You can make the parent proc return 1 on a slip, and then check if(..()) here instead of doing a redundant istype check.

Also, instead of overriding New() I think you can just set the potency var to 5.