Changelog for spacepart-

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- Renamed Math.Geometry to Data.SpacePart.AABB
- Renamed Data.QuadTree to Data.SpacePart.QuadTree
- Added Data.SpacePart.QuadTree.query. Returns all elements that intersect a given boundary.
- The inclusive nature of the boundary's min extent should take precedence of the exclusive
  nature of the max extent.
    Before this change many of the tests failed when boundaries of 0 area were involved. One case
    that did not work was constructing a quadtree containing elements of 0 area. This change
    corrected this.
    The tests all_elements_inserted_query_prop and element_bounds_query_is_element_prop stil
    fail if the element is of 0 area. 
- Cannot create quadtrees with initial bounds of 0 area.
- Removed requirement on elements being an instance of the Intersectable class. The only
  required instance is of Data.SpacePart.AABB.HasBoundary.
- Changed package name to spacepart instead of data-spacepart. The last release of
  data-spacepart used a data based version number. This version number policy did not work well
  with the standard package version policy. 
- Added some QuickCheck based checks. Run with test/run_verify
- Cleaned up the module exports.

20090126.0 - Initial release.