Support Python 2.6
Support Python 2.6

sontek/pymemcache,thedrow/pymemcache,methane/pymemcache,dive-tv/pyelasticache_client,duanhongyi/pymemcache,pinterest/pymemcache,harlowja/pymemcache,mbrukman/pymemcache,pinterest/pymemcache,sontek/pymemcache,bwalks/pymemcache,ewdurbin/pymemcache,adamchainz/pymemcache