Added a new ROS-node, the landing_navigator. It can get called when the drone is flying. It looks for a tag, if it doesn't find one, it starts turning the drone, till one is visible. Once a tag is visible, it tries to center the tag
small updates, trying to make the landing_controller stoppable with ctrl+c,
Find & approach rudimentally work (at least theoretically). Will now
add a PID-Controller to finetune the parameters
Rewrote whole landing_navigator to landing_controller, should work
so far as to approach the front tag.
Landing_navigator is deprecated
Merge pull request #2 from rabenimmermehr/Landing_Navigator

Landing navigator