ENH: numpy sum instead of python sum
ENH: numpy sum instead of python sum

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