Add travis ci

Tried to add travis ci hook with building project and running tests but somewhat failed.

https://travis-ci.org/loginwashere/macaba/jobs/5942931 here you can see the log of build.

As I can see there was a problem with cloning erlang_protobuffs git repo.

(If you find this useful you can merge this pull request and also you need to sign up on travis-ci.org, enable there build for macaba repo and also configure hook in repo settings on github for travis.)