Update index.rst
Update index.rst

still playing with the layout
landlab/landlab,ManuSchmi88/landlab,amandersillinois/landlab,cmshobe/landlab,SiccarPoint/landlab,cmshobe/landlab,Carralex/landlab,decvalts/landlab,RondaStrauch/landlab,laijingtao/landlab,ManuSchmi88/landlab,RondaStrauch/landlab,Carralex/landlab,amandersillinois/landlab,RondaStrauch/landlab,landlab/landlab,Carralex/landlab,csherwood-usgs/landlab,cmshobe/landlab,SiccarPoint/landlab,landlab/landlab,csherwood-usgs/landlab,ManuSchmi88/landlab,decvalts/landlab,laijingtao/landlab