COMP: Consistent case in filenames

Examples/DeformableBody/DeformableBodyExample.cpp

Examples/SPH-Obj-SDF/SPH-Obj-SDFInteractionExample.cpp

Examples/SPHFluid/Fluid.hpp

Examples/SPHFluid/SPHFluidExample.hpp

Examples/Vessel/vesselExample.cpp

...isionDetection/Testing/imstkSurfaceMeshToSphereCDTest.cpp

Source/CollisionHandling/imstkPbdCollisionHandling.cpp

Source/CollisionHandling/imstkPbdCollisionHandling.h

Source/CollisionHandling/imstkPbdPickingCH.cpp

Source/CollisionHandling/imstkPbdPickingCH.h

Source/CollisionHandling/imstkPenaltyCH.cpp

Source/CollisionHandling/imstkSphCollisionHandling.cpp

Source/CollisionHandling/imstkSphCollisionHandling.h

Source/Constraint/PbdConstraints/imstkPbdFemConstraint.cpp

Source/Constraint/PbdConstraints/imstkPbdFemConstraint.h

Source/Constraint/PbdConstraints/imstkPbdFemTetConstraint.h

...els/InternalForceModel/imstkCorotationalFemForceModel.cpp

...odels/InternalForceModel/imstkCorotationalFemForceModel.h

...calModels/InternalForceModel/imstkLinearFemForceModel.cpp

...micalModels/InternalForceModel/imstkLinearFemForceModel.h