COMP: using size_t more consistently and other warnings on MSVC/Windows

...traint/PbdConstraints/imstkLinearProjectionConstraint.cpp

...nstraint/PbdConstraints/imstkLinearProjectionConstraint.h

Base/Core/imstkColor.cpp

Base/Core/imstkModule.cpp

Base/Devices/imstkVRPNDeviceClient.cpp

Base/Devices/imstkVRPNDeviceServer.cpp

Base/Devices/imstkVRPNDeviceServer.h

Base/DynamicalModels/ObjectModels/imstkPbdModel.cpp

Base/Geometry/Map/imstkTetraTriangleMap.cpp

Base/Geometry/Map/imstkTetraTriangleMap.h

Base/Geometry/Mesh/imstkHexahedralMesh.cpp

Base/Geometry/Mesh/imstkHexahedralMesh.h

Base/Geometry/Mesh/imstkMesh.cpp

Base/Geometry/Mesh/imstkMesh.h

Base/Geometry/Mesh/imstkSurfaceMesh.cpp

Base/Geometry/Mesh/imstkSurfaceMesh.h

Base/Geometry/Mesh/imstkTetrahedralMesh.cpp

Base/Geometry/Mesh/imstkTetrahedralMesh.h

Base/Geometry/Reader/imstkMSHMeshIO.cpp

Base/Geometry/Reader/imstkVegaMeshIO.cpp