added dispose() for StaticPool
added dispose() for StaticPool

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