v0.5.0
- Points are now represented as [x, y] rather than {x: x, y: y}.
- d3.quadtree now takes an optional extent [[x0, y0], [x1, y1]].
- Replaced public fields quadtree.{x0,y0,x1,y1} with quadtree.extent.
- Changed quadtree.root to a method.
- Added quadtree.cover.
- Added quadtree.size.
- Added quadtree.points.
- Added quadtree.copy.