Remove redundant comparisons in pathfinder.
Simplify range query result ordering.
Avoid throwing exception on script errors in debug serializer.
This was SVN commit r7828.
Add short-range vertex-based pathfinder.
Integrate new pathfinder into unit motion code.
Change obstruction system to get rid of circles, and differentiate
structures from units.
Make PositionChanged messages synchronous.
Try to prevent some accidental float->int conversions.
This was SVN commit r7484.
Ykkrosh