Put Spherical Kernels into Kernels/Spherical

Src/Kernels/Spherical/FAbstractSphericalKernel.hpp

Src/Kernels/Spherical/FHarmonic.hpp

Src/Kernels/Spherical/FSphericalBlasKernel.hpp

Src/Kernels/Spherical/FSphericalBlockBlasKernel.hpp

Src/Kernels/Spherical/FSphericalCell.hpp

Src/Kernels/Spherical/FSphericalKernel.hpp

Src/Kernels/Spherical/FSphericalParticle.hpp

Src/Kernels/Spherical/FSphericalRotationKernel.hpp

Tests/testCompareIOTree.cpp

Tests/testCompareKernels.cpp

Tests/testMemStats.cpp

Tests/testMpiCsvSaver.cpp

Tests/testSphericalAlgorithm.cpp

Tests/testSphericalBlasAlgorithm.cpp

Tests/testSphericalBlockBlasAlgorithm.cpp

Tests/testSphericalEwalAlgorithm.cpp

Tests/testSphericalGalaxyCsv.cpp

Tests/testSphericalProcAlgorithm.cpp

Tests/testSphericalRotationAlgorithm.cpp

Tests/testSphericalTsmAlgorithm.cpp