ENH: Moving from KDTree to cKDTree
cKDTree working with Distance
ENH: for cKDTree #460
Merge branch 'kdtree' of github.com:sjsrey/pysal into kdtree
handling check for scipy version and support for older KDTree
ENH more checks to handle kdtree changes since scipy 0.11.0
ENH missing True in example
Merge pull request #477 from sjsrey/kdtree

cKDTree for #460