tweaks to install instructions
tweaks to install instructions

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