Missing Quays in Overture

Hello, 

I believe quays are missing in Overture (probably should go in `base/infrastructure` like piers), gotta know where to tie up a boat!

Ex:

https://www.openstreetmap.org/way/907355715#map=19/51.487666/-0.227828
https://www.openstreetmap.org/way/1092097630#map=17/50.809657/-1.099325