Merge pull request #2405 from chrisgarrity/feature/switch-languages

package.json

src/containers/blocks.jsx

src/containers/language-selector.jsx

src/containers/menu.jsx

src/index.js

src/lib/app-state-hoc.jsx

src/lib/connected-intl-provider.jsx

src/lib/hash-parser-hoc.jsx

src/playground/intl.js

src/reducers/gui.js

src/reducers/intl.js

src/reducers/locales.js

test/unit/util/hash-project-loader-hoc.test.jsx