Fix warning on <pre> inside <p>

Update gitter chat url on README.md

Merge pull request #74 from diegohaz/refactor/eslint-airbnb

Use airbnb eslint config

Merge pull request #47 from diegohaz/feature/arc-theme

Add arc-theme

Merge branch 'redux' into universal-redux

Merge branch 'master' into redux

Merge branch 'universal-redux' into fullstack

Update README.md

Merge branch 'redux' into universal-redux

Merge branch 'master' into redux