OPM-122: Added MAPAXES compare to the grid compare
OPM-122: Added MAPAXES copy to the grid copy
OPM-122: Setting verbose to true in grid compare
OPM-122: Added ecl_grid_fwrite() test.
Merge pull request #572 from joakim-hove/OPM-122

Fixed: ecl_grid_alloc_copy() missed MAPAXES