Refactored GPIS classes.

VirtualRobot/CMakeLists.txt

VirtualRobot/math/Contact.h

VirtualRobot/math/DataR3R1.h

VirtualRobot/math/GaussianImplicitSurface3D.cpp

VirtualRobot/math/GaussianImplicitSurface3D.h

VirtualRobot/math/GaussianImplicitSurface3DNormals.cpp

VirtualRobot/math/GaussianImplicitSurface3DNormals.h

VirtualRobot/math/GaussianObjectModel.cpp

VirtualRobot/math/GaussianObjectModelNormals.cpp

VirtualRobot/math/Kernels.cpp

VirtualRobot/math/Kernels.h

...lRobot/tests/MathGaussianImplicitSurface3DNormalsTest.cpp