ate (x,y) coordinates if input is (lon,lat) 
                             generate (lon,lat) coordinates if input is (x,y)
                            ['true' ; 'false' (default)], see myproject.m
   [optional] 'zone'    = specify UTM zone for projection
   [optional] 'addCoriolis' = calculate Coriolis param (f), requires [lon,lat]

 OUTPUT:
    Mobj = matlab structure containing mesh data

 EXAMPLE USAGE
    Mobj = read_grid_mesh('grid','UK_grid.grid','coordinate','spherical','addCoriolis','true')

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