Docs; doctests; deprecation on base.py
Docs; doctests; deprecation on base.py

Ongoing improvements

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