Remove Parrot's Ardrone library files
Add patch to be applied to ARDroneLib external project (pulled in by cmake)
Use cmake's externalproject to download Parrot's ardrone during catkin make
Correct errors in CMakelist and the ardrone_lib.patch's Makefile
Update installation instructions
Install ardrone libs into a subfolder to avoid possible file name clashes
Use a git tag to only pull version 2.0.1 of the ARDroneSDK
Fix the ardrone_lib.patch to apply against the vanilla ARDroneSDK code provided by parrot
Vanilla ARDroneSDK/ARDroneLib 2.0.1 is included in the driver as an archive.
README modified for catkin build and ARDrone's external build.