Merge branch 'refactoring' into ETI-Application

Base/Collision/CollisionData/imstkCollisionData.h

Base/Collision/CollisionDetection/imstkCollisionDetection.h

Base/Collision/CollisionDetection/imstkMeshToMeshCD.h

Base/Collision/CollisionDetection/imstkPlaneToSphereCD.h

Base/Collision/CollisionDetection/imstkSphereToSphereCD.h

Base/Collision/CollisionHandling/imstkCollisionHandling.h

Base/Collision/CollisionHandling/imstkPenaltyMeshToRigidCH.h

Base/Collision/CollisionHandling/imstkPenaltyRigidCH.h

Base/Collision/imstkInteractionPair.h

Base/Collision/imstkPbdInteractionPair.cpp

Base/Collision/imstkPbdInteractionPair.h

Base/Constraint/CMakeLists.txt

Base/Constraint/imstkPbdCollisionConstraint.cpp

Base/Constraint/imstkPbdCollisionConstraint.h

Base/Constraint/imstkPbdConstraint.cpp

Base/Constraint/imstkPbdConstraint.h

Base/Core/imstkColor.cpp

Base/Core/imstkColor.h

Base/Core/imstkLogger.cpp

Base/Core/imstkLogger.h