Adding set_camera_view.
Ternary daftness fix.
Adding PyCharm files.
Some Python3 compatibility.
Removing PyCharm workspace.xml
Another Python3 tweak.
Keys for swapping camera view.
Video channel fix and another unknown state.
Merge branch 'master' into school-demo

Conflicts:
	.idea/python-ardrone.iml
Merge branch 'school-demo' into school-demo-exercise-one-answer