Refactoring pdata with new IO

openfpm_io

src/Decomposition/ie_loc_ghost.hpp

src/Grid/grid_dist_id.hpp

src/Grid/staggered_dist_grid.hpp

src/Grid/staggered_dist_grid_util.hpp

src/Vector/vector_dist.hpp

src/metis_util.hpp

vtk/domain_gen_vtk.cpp