added "viewonly" flag to allow relations that dont affect flush()
added "viewonly" flag to allow relations that dont affect flush()

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