Adding Raise/Lower land height
Placing Trees
Adding place buildings button
Adding a interface query system
Making styles use the query system
Enabled dynamic style changing
Moving to query system for invokables
Making activities persistent
Adding ability to import ifaces; disabling UI text for now
Working on triangle intersections for mouse picking.  Broken.
Still working on mouse picking.  Still broken.
Work on left turns; untested
Adding Lane end markers
Adding lane marker arrowheads (untested)
Adding stop signs (untested)
Fixing stop signs
Stop lights; more work on left turns
Moving lane creation code for intersections to the strategy; working on TrafficLightStrategy.Phase
Angles (WIP)
Fixing some bugs in Angles and traffic lights