updating gitignore
updating gitignore

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