Update install.rst
Update install.rst
landlab/landlab,RondaStrauch/landlab,RondaStrauch/landlab,Carralex/landlab,SiccarPoint/landlab,amandersillinois/landlab,ManuSchmi88/landlab,Carralex/landlab,csherwood-usgs/landlab,decvalts/landlab,csherwood-usgs/landlab,cmshobe/landlab,RondaStrauch/landlab,cmshobe/landlab,laijingtao/landlab,decvalts/landlab,ManuSchmi88/landlab,Carralex/landlab,ManuSchmi88/landlab,landlab/landlab,landlab/landlab,SiccarPoint/landlab,amandersillinois/landlab,laijingtao/landlab,cmshobe/landlab