Added module for faces of a structured quad grid.
Added module for faces of a structured quad grid.

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