This reverts commit d0d1ee303e41fe4ba762a031b78c3894edac52df.
This patch: - reformats codebase to use 2-spaces instead of 4. This will align the project with other codebases (e.g. DevTools and Lighthouse) - enables eslint indentation checking References #19
This patch: - adds travis - adds eslint as required in devdeps - cleans up travis yml
