update testpypi instructions
update testpypi instructions

ljwolf/pysal_core,ljwolf/pysal,sjsrey/pysal,hasecbinusr/pysal,hasecbinusr/pysal,TaylorOshan/pysal,weikang9009/pysal,TaylorOshan/pysal,sjsrey/pysal_core,ljwolf/pysal_core,lixun910/pysal,ljwolf/pysal,pysal/pysal,lixun910/pysal,pedrovma/pysal,TaylorOshan/pysal,ljwolf/pysal,lixun910/pysal,sjsrey/pysal_core,ljwolf/pysal_core,lanselin/pysal,hasecbinusr/pysal,sjsrey/pysal_core