moved dirty flags, dirty attributes to unitofwork
moved dirty flags, dirty attributes to unitofwork

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