Keep compatibility with django 1.7 for generic.fields.BaseGenericRelation
Keep compatibility with django 1.7 for generic.fields.BaseGenericRelation

jjz/mezzanine,damnfine/mezzanine,wyzex/mezzanine,jerivas/mezzanine,eino-makitalo/mezzanine,theclanks/mezzanine,geodesign/mezzanine,douglaskastle/mezzanine,frankier/mezzanine,stephenmcd/mezzanine,wbtuomela/mezzanine,industrydive/mezzanine,readevalprint/mezzanine,sjdines/mezzanine,eino-makitalo/mezzanine,Cajoline/mezzanine,spookylukey/mezzanine,sjuxax/mezzanine,adrian-the-git/mezzanine,ZeroXn/mezzanine,webounty/mezzanine,molokov/mezzanine,joshcartme/mezzanine,Cajoline/mezzanine,molokov/mezzanine,dustinrb/mezzanine,dustinrb/mezzanine,christianwgd/mezzanine,biomassives/mezzanine,promil23/mezzanine,tuxinhang1989/mezzanine,molokov/mezzanine,webounty/mezzanine,dsanders11/mezzanine,PegasusWang/mezzanine,wyzex/mezzanine,dovydas/mezzanine,geodesign/mezzanine,sjuxax/mezzanine,dovydas/mezzanine,promil23/mezzanine,vladir/mezzanine,readevalprint/mezzanine,mush42/mezzanine,viaregio/mezzanine,frankchin/mezzanine,wbtuomela/mezzanine,SoLoHiC/mezzanine,saintbird/mezzanine,spookylukey/mezzanine,damnfine/mezzanine,stephenmcd/mezzanine,nikolas/mezzanine,tuxinhang1989/mezzanine,jjz/mezzanine,wbtuomela/mezzanine,christianwgd/mezzanine,biomassives/mezzanine,saintbird/mezzanine,webounty/mezzanine,gradel/mezzanine,dsanders11/mezzanine,industrydive/mezzanine,theclanks/mezzanine,christianwgd/mezzanine,damnfine/mezzanine,readevalprint/mezzanine,joshcartme/mezzanine,SoLoHiC/mezzanine,Cicero-Zhao/mezzanine,douglaskastle/mezzanine,emile2016/mezzanine,frankier/mezzanine,dsanders11/mezzanine,joshcartme/mezzanine,sjdines/mezzanine,sjuxax/mezzanine,ryneeverett/mezzanine,sjdines/mezzanine,dovydas/mezzanine,emile2016/mezzanine,nikolas/mezzanine,viaregio/mezzanine,Skytorn86/mezzanine,SoLoHiC/mezzanine,geodesign/mezzanine,PegasusWang/mezzanine,ZeroXn/mezzanine,Cajoline/mezzanine,Cicero-Zhao/mezzanine,jerivas/mezzanine,biomassives/mezzanine,mush42/mezzanine,jjz/mezzanine,Skytorn86/mezzanine,tuxinhang1989/mezzanine,dustinrb/mezzanine,ZeroXn/mezzanine,mush42/mezzanine,spookylukey/mezzanine,frankier/mezzanine,ryneeverett/mezzanine,frankchin/mezzanine,douglaskastle/mezzanine,frankchin/mezzanine,theclanks/mezzanine,emile2016/mezzanine,vladir/mezzanine,adrian-the-git/mezzanine,promil23/mezzanine,adrian-the-git/mezzanine,ryneeverett/mezzanine,Skytorn86/mezzanine,nikolas/mezzanine,gradel/mezzanine,industrydive/mezzanine,wyzex/mezzanine,PegasusWang/mezzanine,stephenmcd/mezzanine,eino-makitalo/mezzanine,saintbird/mezzanine,vladir/mezzanine,jerivas/mezzanine,gradel/mezzanine,viaregio/mezzanine