deprecation
deprecation

Mainly deprecation of diagonal-related links.

Added text alluding to possible future changes.

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