near OSM highway=crossing nodes. #795
Not enabled anywhere, because it doesn't seem to produce good results.
Possibly footway=crossing ways need to be used for this as well.
Had to regenerate all maps, since the binary format changes.
- offstreet_parking_length in importer config
- backwards compatibility for map edits
- fixing up the baked-in proposals
- working around a few PolyLine bugs that happen with the new rounding
- Don't regenerate actdev scenarios yet -- the upstream JSON format is
out of date, will have to fix separately.