Remove go 1.3 from travis build
Remove go 1.3 from travis build

atyenoria/docker-gen,appropriate/docker-gen,viranch/docker-gen,cybercode/docker-gen,niekoost/docker-gen,deepglint/docker-gen,mccahill/docker-gen,wujingke/docker-gen,cuttlesoft/docker-gen,dataferret/docker-gen,remh/docker-gen,jwilder/docker-gen,Boran/docker-gen,dharmit/docker-gen,ypid/docker-gen,mccahill/docker-gen,baptistedonaux/docker-gen,dskatz/docker-gen,hlta/docker-gen,deepglint/docker-gen,webner/docker-gen,rashpile/docker-gen,asdine/docker-gen,cherrydocker/docker-gen