Add some FIXMES about OSGB36 and ETRS89 -> Lon, Lat conversion
Add some FIXMES about OSGB36 and ETRS89 -> Lon, Lat conversion

urschrei/lonlat_bng,urschrei/lonlat_bng,urschrei/rust_bng,urschrei/rust_bng,urschrei/lonlat_bng