- more set operations
- more set operations


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