REFAC: Move light classes into their own headers

Examples/BoneShaving/BoneShavingExample.cpp

Examples/CameraController/CameraControllerExample.cpp

...etection/ManualCDWithOctree/ManualCDWithOctreeExample.cpp

Examples/CreateEnclosingMesh/CreateEnclosingMesh.cpp

Examples/DebugRendering/DebugRenderingExample.cpp

Examples/DeformableBody/DeformableBodyExample.cpp

Examples/FemurCut/FemurCutExample.cpp

Examples/GeometryProcessing/GeometryProcessingExample.cpp

Examples/GeometryTransforms/GeometryTransformsExample.cpp

Examples/Levelset/levelsetExample.cpp

Examples/MultipleScenes/multipleScenes.cpp

Examples/ObjectController/ObjectControllerExample.cpp

...ectControllerDummyClient/ObjectCtrlDummyClientExample.cpp

Examples/Octree/OctreeExample.cpp

Examples/OpenVRController/OpenVRControllerExample.cpp

Examples/PBD/PBDCloth/pbdClothExample.cpp

Examples/PBD/PBDClothRemap/pbdClothRemapExample.cpp

...ionMultipleObjects/PBDCollisionMultipleObjectsExample.cpp

...BD/PBDCollisionOneObject/PBDCollisionOneObjectExample.cpp

...ples/PBD/PBDCollisionStairs/PBDCollisionStairsExample.cpp