Make ActiveMapper support viewonly property
Make ActiveMapper support viewonly property

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