Add some world-coordinate helpers.
Convert mission scripts to world coords.
Convert HackyAI to world coords.
Remove PPos overload of ClosestTo.
Remove PPos overload of FindUnitsInCircle.
Rename FindUnitsInCircle -> FindActorsInCircle.
Remove PPos overload of FindUnits.
Rename FindUnits -> FindActorsInBox.
Remove PPos from range circle drawing.
Convert ScreenShaker to world coords.
Merge pull request #3583 from pchote/omg-more-world-coords

More world coordinates