See issue 121, close the file when the obj is deleted.
See issue 121, close the file when the obj is deleted.


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