Linting problem and suggestion on using travis-ci

[TintypeMolly]

https://travis-ci.org/

If the source code is not linted for every commit and poorly formatted code stays, it turns into a disaster pretty fast since lint-formatting commits usually do not merge automatically.

If we don't care formatting "at all", it's ok.

But if we do care, rebasing on such commits is a painful job.

So how about applying travis-ci?

travis-ci can test and flag go or no-go for each pull request automatically.

Applying only eslint would suffice for now, and we can add some tests later if needed.

[TintypeMolly]

https://travis-ci.org/TintypeMolly/TweetDeckPlayer/jobs/161849240

something like this