Added VegCA to __all__.
Added VegCA to __all__.

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