Add travis.yml file
Add travis.yml file

We have many tests, having this would simplify contributing also easier
because Github would show us the CI result on PR's.

strivecast/hcl,hashicorp/hcl,savaki/hcl,hashicorp/hcl,strivecast/hcl,strivecast/hcl,hashicorp/hcl,strivecast/hcl,strivecast/hcl,hashicorp/hcl,hashicorp/hcl,KONTRAKT-DLL/hcl