Added .travis.yml for Travis-CI
Added .travis.yml for Travis-CI

jmhodges/dns,skynet/dns,cloudflare/dns,modulexcite/dns,AlexCheong/dns,Git-Host/dns,janstk/dns,bboreham/dns,bragr/dns,asergeyev/dns,tsenart/dns,ErikDubbelboer/dns,skyportsystems/dns,benbearchen/dns,miekg/dns,hugozhu/dns,rolandshoemaker/dns,letsencrypt/dns,ezoic/dns,tempbottle/dns,jdef/dns,ym/go-dns,flebarbe/dns,josephyzhou/dns,Psiphon-Inc/dns,curtiszimmerman/dns,michaelharo/dns