Reoganize gpu sources (part 2)

HySoP/hysop/fields/gpuscalar.py

HySoP/hysop/fields/gpuvector.py

HySoP/hysop/gpu/QtRendering.py

HySoP/hysop/gpu/cl_src/copy_2D.cl

HySoP/hysop/gpu/cl_src/copy_2D_opt2.cl

HySoP/hysop/gpu/cl_src/copy_3D_locMem.cl

HySoP/hysop/gpu/cl_src/kernels/copy.cl

HySoP/hysop/gpu/cl_src/kernels/copy_locMem.cl

HySoP/hysop/gpu/cl_src/kernels/copy_noVec.cl

HySoP/hysop/gpu/cl_src/kernels/rendering.cl

HySoP/hysop/gpu/cl_src/kernels/transpose_xy.cl

HySoP/hysop/gpu/cl_src/kernels/transpose_xz.cl

HySoP/hysop/gpu/cl_src/remeshing/weights_builtin_noVec.cl

HySoP/hysop/gpu/cl_src/remeshing/weights_noVec_builtin.cl

.../gpu/cl_src/transpose_2D_xy_coalesced_locPad_Diag_opt4.cl

...src/transpose_3D_xy_coalesced_locPad_Diag_2Dslice_opt2.cl

...src/transpose_3D_xy_coalesced_locPad_Diag_2Dslice_opt4.cl

.../gpu/cl_src/transpose_3D_xy_coalesced_locPad_Diag_opt2.cl

.../gpu/cl_src/transpose_3D_xz_coalesced_Diag_bis_3DBlock.cl

HySoP/hysop/gpu/gpu_analytic.py