travisci: install dos2unix, and other fixes
travisci: install dos2unix, and other fixes

mozilla/TLS-Observer,mozilla/tls-observatory,jasonthomas/tls-observatory,mozilla/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,mozilla/tls-observatory,mozilla/tls-observatory,jasonthomas/tls-observatory,jasonthomas/tls-observatory,jasonthomas/tls-observatory