map_features.xml:

map_features.xml:
- add the various _link roads.
- make 'oneway' an 'always' attribute.

potlatch.css:
- highway=tertiary_link
- service=alley
- highway=road
- text on paths, schools, sports centres
- tweak waterway tunnels, powerlines
- barrier=fence
- power=generator
- landuse=*
- leisure=garden
- embankment=yes (looks poo)
- boundary=administrative (TODO other boundaries?)
- sports centre, school

Possibly controversial: change rendering of unmatched ways to be high vis.