New Package: arl_ardrone_examples

I'd like to add this package (https://github.com/parcon/arl_ardrone_examples) to the known software list. 

 This basic release is designed to help roboticists and hobbyist new to the AR drone quickly be able to command the robot. A variety of simple nodes are included to show users how to takeoff, land, reset, and fly the AR drone. Nodes for the purposes of helping users use the cameras will be included soon in a update.