Adding support of CUDA in the PDE solver.

examples/heat-equation/CMakeLists.txt

examples/heat-equation/heatEquationSolver_impl.h

examples/heat-equation/tnl-heat-equation-eoc.cpp

examples/heat-equation/tnl-heat-equation-eoc.cu

examples/heat-equation/tnl-heat-equation-eoc.h

examples/heat-equation/tnl-heat-equation.cpp

examples/heat-equation/tnl-heat-equation.cu

examples/heat-equation/tnl-heat-equation.h

examples/heat-equation/tnl-run-heat-equation-eoc-test

install

src/core/arrays/tnlArray.h

src/core/arrays/tnlConstSharedArray.h

src/core/arrays/tnlMultiArray.h

src/core/arrays/tnlSharedArray.h

src/core/tnlCuda.h

src/core/tnlFile.h

src/core/tnlObject.h

src/core/tnlString.h

src/core/vectors/tnlMultiVector.h

src/core/vectors/tnlSharedVector.h