Merge branch demarius into master.

diary.md

@@ -1,2 +1,9 @@
 Need to think about how to deal with rectangles that share points along the
 edges. Do they intersect?
+
+Hilbert clustering: http://www.academia.edu/3027346/Clustering_in_Hilbert_R_Trees_A_study_on_Spatial_Indexing_in_R_Trees
+
+Google implementation:
+https://code.google.com/p/pyrtree/source/browse/pyrtree/rtree.py
+
+Neat 2D ideas: https://github.com/mourner/rbush/blob/master/rbush.js

t/r-tree/splitx.t.js

@@ -21,5 +21,5 @@ function prove (assert) {
     assert(area.splitX(5), [
         new rects.Area(-Infinity, Infinity, -Infinity, 5),
         new rects.Area(5, Infinity, -Infinity, Infinity)
-    ], "Split x by 5")
+    ], "Split x with infinite bounds by 5")
 }

t/r-tree/splity.t.js

@@ -20,5 +20,5 @@ function prove (assert) {
     assert(area.splitY(10), [
         new rects.Area(-Infinity, 10, -Infinity, Infinity),
         new rects.Area(-Infinity, Infinity, 10, Infinity)
-    ], "Split x by 10")
+    ], "Split y by 10 with infinite bounds")
 }