Merge branch 'devel' into 'devel'

CMakeLists.txt

cmake

include/curves/bezier_curve.h

include/curves/curve_abc.h

include/curves/curve_constraint.h

include/curves/linear_variable.h

include/curves/optimization/definitions.h

include/curves/optimization/details.h

include/curves/optimization/integral_cost.h

include/curves/optimization/quadratic_problem.h

include/curves/piecewise_curve.h

include/curves/quadratic_variable.h

include/curves/se3_curve.h

include/curves/so3_linear.h

python/curves_python.cpp

python/namespace.cpp

python/namespace.h

python/optimization_python.cpp

python/optimization_python.h

python/python_variables.cpp