Change the license to GPLv3

LICENSES/GPL-3.0-only.txt

LICENSES/MIT.txt

README.md

cpp/header.txt

cpp/src/IK_manipulator.cpp

cpp/src/LQT.cpp

cpp/src/iLQR_bicopter.cpp

cpp/src/iLQR_bimanual.cpp

cpp/src/iLQR_car.cpp

cpp/src/iLQR_manipulator.cpp

cpp/src/iLQR_manipulator_obstacle.cpp

cpp/src/iLQR_obstacle_GPIS.cpp

julia/IK.jl

julia/iLQR_manipulator.jl

matlab/FD.m

matlab/IK_manipulator.m

matlab/IK_nullspace.m

matlab/IK_num.m

matlab/LQR_infHor.m

matlab/LQT.m