Create POC for automated visual testing

[coenkoopmans]

Description

Research the possibilities for automated visual testing, build a proof of concept, and supply a pull request. Ideally, this solution should conform to the following:

• Able to run with a package.json script (similar to npm run test) so we can use it with Travis CI.
• Have some option to automate internet explorer 11 testing, as this is important to the corporate market. (Suggestion: connect to BrowserStack with a webhook via Travis)
• Compare supplied screenshots of desired output with screenshots that the tool makes on-the-fly to assess the correctness of the result.

Acceptance criteria

• Research best tool to do automated visual testing with and post a small report of research results as a comment on this issue
• Test with a simple component, such as button, and prove it works -- both a passing and a failing test
• Make a package.json command like npm run test or similar to run the test.
• Add to the Travis YML file and make sure on every build the test gets run on all components
• Let Travis do an Internet Explorer 11 test on certain conditions -- at least on merges to develop and master, but preferably on every build.