Update libardrone.py
Merge pull request #3 from mehoskrd/patch-1

Update libardrone.py
Added Flattr button.
Merge branch 'master' of github.com:venthur/python-ardrone
fixed button
Updated arnetwork to provide Windows support
Merge remote-tracking branch 'origin/master'
Modified demo to use Hough transofrm to find vanishing points and navigate towards end of corridor.