Version 0.2
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* LED animations for ARDrone
* Navigation data fetched (bin/nav_data_demo.pl)
* SDL output of nav data
* USERBOX:userbox_cmd config constants

Version 0.3
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* Event system ("pitch 0.5 for 30 seconds" )
* Joystick control
* Wiimote control

Version 0.4
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* Video

Version 5
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* Error message formatting in REPL
