Changed sort_links to resort link midpoints.
Changed sort_links to resort link midpoints.

amandersillinois/landlab,csherwood-usgs/landlab,Carralex/landlab,ManuSchmi88/landlab,RondaStrauch/landlab,cmshobe/landlab,laijingtao/landlab,RondaStrauch/landlab,ManuSchmi88/landlab,cmshobe/landlab,cmshobe/landlab,Carralex/landlab,csherwood-usgs/landlab,RondaStrauch/landlab,laijingtao/landlab,landlab/landlab,amandersillinois/landlab,landlab/landlab,ManuSchmi88/landlab,landlab/landlab,Carralex/landlab