fixed minor issues with new protocol recipes

Ryan - Thanks for the feedback, below are my responses to the specific items you raised.

> This sentence may have gotten cut off.

Fixed.

> I wonder if there is a good example of extending a type the other way around (you own the type, but not the protocol.)

I like this idea. Probably need to scan through some of the main clojure libraries and find a protocol that is suitable for an example.

> The folder names for these should match the file name.

Fixed.

> It might also serve this recipe well to go into how Protocols work with a little more depth.

I like this idea. It just comes down to how soon I can carve out time to do it.