* Replace browserify with webpack

* Add react-intl-translations-manager

* Do not minify in development, add offline-plugin for ServiceWorker background cache updates

* Adjust tests and dependencies

* Fix production deployments

* Fix tests

* More optimizations

* Improve travis cache for npm stuff

* Re-run travis

* Add back support for custom.scss as before

* Remove offline-plugin and babili

* Fix issue with Immutable.List().unshift(...values) not working as expected

* Make travis load schema instead of running all migrations in sequence

* Fix missing React import in WarningContainer. Optimize rendering performance by using ImmutablePureComponent instead of
React.PureComponent. ImmutablePureComponent uses Immutable.is() to compare props. Replace dynamic callback bindings in
<UI />

* Add react definitions to places that use JSX

* Add Procfile.dev for running rails, webpack and streaming API at the same time

* Update ar.jsx

Updating some (ar) translation.

* Update ar.yml

Pushing some missing translation strings on ar.yml

Adding more missing strings.

* Create ar.jsx

* Preparing file for translation.

* Create ar.yml

* Preparing file for translation.

* Create simple_form.ar.yml

* Preparing file for translation.

* Create devise.ar.yml

* Preparing file for translation.

* Create doorkeeper.ar.yml

* Preparing file for translation.

* Update index.jsx

Preparing file for translation.

* Update mastodon.jsx

* Preparing file to translation.
* Correction thanks to @Taekiro
  https://github.com/tootsuite/mastodon/pull/1798#pullrequestreview-32924922

* Update settings_helper.rb

Preparing file to translation.

* Update application.rb

* Preparing file to translation.

* Update simple_form.ar.yml

* Update doorkeeper.ar.yml

* Update devise.ar.yml

* Update ar.yml

* Fix i18n-tasks unused issue (ar)

Remove unused translation strings

* Update application.rb

* Update ar.jsx

* Fix various issues with Arabic translation

* Fix duplication caused in merge
* Fix syntax error in devise.ar.yml
* Fix import error Duplicated incorrect import in mastodon.jsx
* Fix duplication error in locales/index.jsx

* Update ar.yml

* Update ar.jsx

* Update ar.yml

* Update ar.jsx

* Fix ar translation