videodata: added a line which makes sure that the right ardrone package is loaded
videodata: added a line which makes sure that the right ardrone package is loaded

On my system, I run the examples as 'python examples/videodata.py' which
results in the path '..' not pointing to the location of the ardron
package. Add a line which explicitly finds the path relative to the
example file.

rc500/ardrone_archive_aarons_laptop,rc500/ardrone_archive_aarons_laptop,rc500/ardrone_archive_aarons_laptop,rc500/ardrone_archive_aarons_laptop,rc500/ardrone_archive_aarons_laptop