Fixed cPickle problem in Python3.
Fixed cPickle problem in Python3.

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