rename method
rename method

This is really a `calc_…`-type deal

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