add deprecated version of calc_grad_of_active_link
add deprecated version of calc_grad_of_active_link

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