BUG: Surface mesh extraction from tet mesh fixes and changes

Examples/DeformableBody/DeformableBodyExample.cpp

Examples/GeometryProcessing/GeometryProcessingExample.cpp

Examples/MultipleScenes/multipleScenes.cpp

...ionMultipleObjects/PBDCollisionMultipleObjectsExample.cpp

...BD/PBDCollisionOneObject/PBDCollisionOneObjectExample.cpp

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

Examples/PBD/PBDDeformableObject/PBD3DDeformableObject.cpp

Examples/RigidBodyDynamics/RigidBodyDynamicsExample.cpp

...idBodyVirtualCoupling/RigidBodyVirtualCouplingExample.cpp

Examples/SPH-FEM-PBD/sphFemPbdExample.cpp

Source/Geometry/Mesh/imstkHexahedralMesh.cpp

Source/Geometry/Mesh/imstkHexahedralMesh.h

Source/Geometry/Mesh/imstkTetrahedralMesh.cpp

Source/Geometry/Mesh/imstkTetrahedralMesh.h

Source/Geometry/Mesh/imstkVolumetricMesh.cpp

Source/Geometry/Mesh/imstkVolumetricMesh.h

Source/Geometry/Testing/imstkSurfaceMeshTest.cpp

Source/Geometry/Testing/imstkTetrahedralMeshTest.cpp

Source/Geometry/imstkGeometryUtilities.cpp

Source/MeshIO/imstkMSHMeshIO.cpp