DOC: updating refs for concordance algorithm
DOC: updating refs for concordance algorithm

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