adding shallow copy method ROD to support multiprocessing.
adding shallow copy method ROD to support multiprocessing.


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