WiFly

This is my first pull request. Sorry if there are any issues.

I've added basic support for using a WiFly -> 3DR Radio bridge. I have tested it and can confirm that it works. Unfortunately I haven't quite figure out how to still get cellular communications to go through while connected to the WiFly but at least I can talk to my copter.
Shortly, in master, we should have a top level Vendor folder for third party libs to live in.