Added 2to3 on setup.py.
Added 2to3 on setup.py.

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