fix namespace bug in testing

	modified:   specs/histogram_spec.js
added rectangle
added initial quadtree
added quadtree splitting
added clear to quadtree
added line and point support to contain

Note: line and point require the dataType attribute,
  otherwise contain will assume the dataType is a rectangle.
added insert to quadtree
added line and point support to intersect

* Also modified test to be shared by intersect and contains.

Note: line and point require the dataType attribute,
otherwise intersect will assume the dataType is a rectangle.
added query to quadtree