Change class names. Collision, ContactHandling, Core

examples/AlphaMap/AlphaMappingExample.cpp

examples/AlphaMap/AlphaMappingExample.h

examples/AudioExample/AudioExample.cpp

examples/AudioExample/AudioExample.h

examples/CollisionDetectionBVH/CollisionDetectionBVH.cpp

examples/CollisionDetectionBVH/CollisionDetectionBVH.h

...ectionSpatialHashing/CollisionDetectionSpatialHashing.cpp

...etectionSpatialHashing/CollisionDetectionSpatialHashing.h

examples/CollisionGrid/CollisionDetectionExample.cpp

examples/CollisionGrid/CollisionDetectionExample.h

examples/ExampleTool/exampleTool.cpp

examples/ExampleTool2/exampleTool2.cpp

examples/MultipleObjects/MultipleObjects.cpp

examples/common/KeyPressSDKShutdown.cpp

examples/common/KeyPressSDKShutdown.h

examples/common/hapticController.cpp

examples/common/hapticController.h

examples/common/pzrMouseCameraController.cpp

examples/common/pzrMouseCameraController.h

examples/common/wasdCameraController.cpp