propagate docstrings for column/fk collections
propagate docstrings for column/fk collections

dstufft/sqlalchemy,itkovian/sqlalchemy,zzzeek/sqlalchemy,ThiefMaster/sqlalchemy,Cito/sqlalchemy,inspirehep/sqlalchemy,pdufour/sqlalchemy,robin900/sqlalchemy,Akrog/sqlalchemy,sandan/sqlalchemy,graingert/sqlalchemy,bootandy/sqlalchemy,WinterNis/sqlalchemy,EvaSDK/sqlalchemy,ThiefMaster/sqlalchemy,brianv0/sqlalchemy,davidfraser/sqlalchemy,inspirehep/sqlalchemy,wfxiang08/sqlalchemy,sqlalchemy/sqlalchemy,bootandy/sqlalchemy,wfxiang08/sqlalchemy,epa/sqlalchemy,wujuguang/sqlalchemy,elelianghh/sqlalchemy,monetate/sqlalchemy,276361270/sqlalchemy,dstufft/sqlalchemy,276361270/sqlalchemy,wujuguang/sqlalchemy,Akrog/sqlalchemy,Cito/sqlalchemy,EvaSDK/sqlalchemy,olemis/sqlalchemy,itkovian/sqlalchemy,alex/sqlalchemy,alex/sqlalchemy,pdufour/sqlalchemy,WinterNis/sqlalchemy,bdupharm/sqlalchemy,monetate/sqlalchemy,brianv0/sqlalchemy,davidfraser/sqlalchemy,robin900/sqlalchemy,graingert/sqlalchemy,halfcrazy/sqlalchemy,elelianghh/sqlalchemy,Cito/sqlalchemy,hsum/sqlalchemy,davidjb/sqlalchemy,j5int/sqlalchemy,davidjb/sqlalchemy,bdupharm/sqlalchemy,j5int/sqlalchemy,olemis/sqlalchemy,sandan/sqlalchemy,halfcrazy/sqlalchemy,alex/sqlalchemy,epa/sqlalchemy,hsum/sqlalchemy