Added functions to sort spokes.
Added functions to sort spokes.

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