Add travis

[slifty]

Description

This PR adds the configuration for Travis, which means now pull requests will actually test the code and ensure nothing is obviously broken.

For now we are going to just have Travis run our tests and run the linter.

Due Diligence Checklist

• [x] Tests
• [x] Documentation
• [x] Consolidated commits
• [x] Relevant labels assigned

Steps to Test

The PR itself should show if the travis integration is working

Deploy Notes

Nothing to deploy

Related Issues

Related to #6 Relies on #12

[slifty]

I just set up travis; I'm not sure if we actually need .travis.yml to be in master for it to get picked up and invoked or not...