bugfix: CityLocation.parse() had wrong regular expression pattern
debug: dump employer stats when querying a zone
traffic: create new ZoneConnection infrastructure and rewrite traffic to use it
traffic: clear zone connections when tile changes
traffic: adjust price points for COM/IND zones as well
debug: show price points on main map display
traffic: slow down the rate of change of wages
traffic: tie growth of zones to traffic/wage metrics
traffic: make trfDensity map full density
traffic: manage traffic directly with ZoneConnection class
traffic: fix evalResidential and use of trafficModifier
debug: dump traffic level on query tool