added *extra to mysql string type to consume extra unsupported arguments from reflection
added *extra to mysql string type to consume extra unsupported arguments from reflection

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