handling check for scipy version and support for older KDTree
handling check for scipy version and support for older KDTree

ljwolf/pysal,badjr/pysal,lanselin/pysal,nathania/pysal,darribas/pysal,pastephens/pysal,TaylorOshan/pysal,TaylorOshan/pysal,ljwolf/pysal,sjsrey/pysal_core,hasecbinusr/pysal,spreg-git/pysal,weikang9009/pysal,pedrovma/pysal,ljwolf/pysal_core,lixun910/pysal,schmidtc/pysal,schmidtc/pysal,pysal/pysal,nathania/pysal,jlaura/pysal,chhao91/pysal,pastephens/pysal,dfolch/pysal,chhao91/pysal,sjsrey/pysal,ljwolf/pysal_core,sjsrey/pysal_core,jlaura/pysal,pastephens/pysal,darribas/pysal,spreg-git/pysal,ljwolf/pysal,lixun910/pysal,jlaura/pysal,badjr/pysal,dfolch/pysal,ljwolf/pysal_core,hasecbinusr/pysal,hasecbinusr/pysal,lixun910/pysal,TaylorOshan/pysal,sjsrey/pysal_core