minor edits on smoothing tutorial
minor edits on smoothing tutorial

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