Remove deprecated headers + reinforce header name policy

include/jrl/walkgen/patterngeneratorinterface.hh

include/jrl/walkgen/pgtypes.hh

...otTrajectoryGeneration/FootTrajectoryGenerationAbstract.h

...Generation/LeftAndRightFootTrajectoryGenerationMultiple.h

src/GlobalStrategyManagers/CoMAndFootOnlyStrategy.h

src/GlobalStrategyManagers/GlobalStrategyManager.h

src/Mathematics/FootConstraintsAsLinearSystem.h

src/Mathematics/FootConstraintsAsLinearSystemForVelRef.h

src/Mathematics/OptCholesky.h

src/Mathematics/PLDPSolverHerdt.h

src/Mathematics/StepOverPolynome.cpp

src/Mathematics/StepOverPolynome.h

src/MotionGeneration/CollisionDetector.h

src/MotionGeneration/ComAndFootRealizationByGeometry.cpp

src/MotionGeneration/ComAndFootRealizationByGeometry.h

src/MotionGeneration/GenerateMotionFromKineoWorks.cpp

src/MotionGeneration/StepOverPlanner.h

src/MotionGeneration/UpperBodyMotion.h

src/MotionGeneration/WaistHeightVariation.h

src/PGTypes.cpp