Merge pull request #1 from mlosch/master

Add generic pid controller
Merge pull request #2 from mlosch/master

Fixed wrong arithmetic operation for d-term.
Ignore qtcreator files
Merge pull request #3 from mlosch/master

fixed critical bug in pid_1d. Added constraint for i-Term. Scaled error in i-Term according to dt.
Added first version of hand_following_controller
Merge pull request #4 from marro10/master

Added first version of hand_following_controller
Package reorganized correctly and checked that everything compiles correctly
Package reorganized correctly and checked that everything compiles correctly
first version of motorcontroller, untested
added license
Now it will use the value NaN to stop instead of <0.30
added parameter server for pid parameters
Now it uses a class instead of a global variable to control the movement of the robot
refactor
bug fix
bug fix
fix
pid parameter tuning
Now a p-controller is used to control the speed of the robot according to the distance between the hand and the robot
add constant handling