some workin on hold, clarifying calcThrustDiff
May try tests with different min/max-speed values
work on hold()
hold and thrust start
testing
hold - compiling
first draft of hold, testable
Merge branch 'hold' of https://github.com/KITrokopter/Control-Application into hold

Conflicts:
	src/controller/Interpolator.cpp
Merge branch 'master' of https://github.com/KITrokopter/Control-Application
Merge branch 'hold'