Add travis 3.4 builds
Add travis 3.4 builds

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