Unfortunately the constraints cannot be implemented using the
_constraints because the controller uses that directly. This
causes discontinuities in the velocity and/or accel at various
points of the flight. In particular this was used in Takeoff.
Instead this was done by changing target accel/velocity in the
jerk-optimal velocity planner for Z.
* add guidance
* remove COL_PREV_ANG and replace with COL_PREV_CNG
* safe max ranges per bin
* increase default value for colprev delay to account for tracking delay
* update parameter description
* fix and extend testing
* add handling for overlapping sensor data
* fix decision process for overlapping sensors
* Add kdevelop to gitignore
* Add test stubs
* Rename px4_add_gtest to px4_add_unit_gtest
* Add infrastructure to run functional tests
* Add example tests with parameters and uorb messages
* Fix memory issues in destructors in uORB manager and CDev
* Add a more real-world test of the collision prevention
Julian Kent