Added setter for status_at_node.
Added setter for status_at_node.

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