Removed allow_column_override documentation. Fixes #1381.
Removed allow_column_override documentation. Fixes #1381.

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