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.
If you feel the logging is important for debugging you can wrap it if an #if DEBUG statement but don't leave commented out code in the PR. We are integrating cocoalumberjack logging framework int he next week or so and that should be helpful in this situation..