Redone as entrance=staircase tagging with addresses,

There are (secondary or primary?) ground floor terrace entrances to some or all of the ground floor flats. I don't know if the staircases actually connect to these ground floor flats. I've tagged those as entrance=home where there seems to be a number, and left a note. Going to where the housenumber is now generally puts you next to the doorbell cluster for the block, so I recknon that's good enough for most wayfinding!