Added more documentation and doctests throughout
Added more documentation and doctests throughout

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