Added more documentation in the form of doxygen doc strings
Added more controller specific doxygen information
Changed a functio name to be more meaningful and added more doxygen information
Added more doxygen documentation (finished up the CCrazyflie documentation)
Added a function to CCrazyflie to relocalize the copter

Relocalization in this context means setting the current copter pose to the origin pose. This is done once automatically when the class is initialized but might be necessary again after navigating for a certain time.