Drone2

ARDrone2 implementation including tests
Drone functions are disabled in release builds (for now)
Jenkins testrun: https://jenkins.catrob.at/job/Catroid-Multi-Job-Custom-Branch/1509/
Open and known issues: https://jira.catrob.at/browse/DRONE

Edit:
New jenkins testrun including recent changes: https://jenkins.catrob.at/view/All-Categories/view/Catroid-multi-job/job/Catroid-Multi-Job-Custom-Branch/1516/
Edit2:
New testrun: https://jenkins.catrob.at/view/All-Categories/view/Catroid-multi-job/job/Catroid-Multi-Job-Custom-Branch/1522/?auto_refresh=true
Edit3:
New testrun: https://jenkins.catrob.at/view/All-Categories/view/Catroid/job/Catroid-Multi-Job-Custom-Branch/1565/