Do you like cocoa? How about a pod with your cocoa?

This pull request adds a podspec so you can install Robot via cocoapods. We found this was pretty easy to do once we added this.

* We marked the initial version at "0.0.1" because we couldn't find a version in the project today. 
* The version pulled in is 3efdcd47a156260abf920dcc24669e6cb2b989e8, but you might want to change this to a tag or branch.