Travis config

[nagygergo]

Hey everyone,

I'm really interested in getting into YoadQA, seems like a good opportunity to learn more about NLP and I'm currently looking for issues that would be good for beginners in the repo.

I found that maybe getting an in-depth look on the build system would be a nice starting point for me, so I thought I would try to put together a CI build system (travis, appveyor), to at least test that the project builds properly.

Any suggestions on what to include in the build system? (build backends, run wikipedia queries, etc.)