* Allow mounting arbitrary columns

* Refactor column headers, allow pinning/unpinning and moving columns around

* Collapse animation

* Re-introduce scroll to top

* Save column settings properly, do not display pin options in
single-column view, do not display collapse icon if there is
nothing to collapse

* Fix one instance of public timeline being closed closing the stream
Fix back buttons inconsistently sending you back to / even if history exists

* Getting started displays links to columns that are not mounted

* Add semi to ESLint rules

* Add padded-blocks to ESLint rules

* Add comma-dangle to ESLint rules

* add config/webpack and storyboard

* add streaming/

* yarn test:lint -- --fix

Use ES Class Fields & Static Properties (currently stage 2) for improve class outlook.

Added babel-plugin-transform-class-properties as a Babel plugin.

* 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

Hide some components rather than unmounting them to allow to show again
quickly and keep the view state such as the scrolled offset.

* Remove deprecated features at React v15.5

- [x] React.PropTypes
- [x] react-addons-pure-render-mixin
- [x] react-addons-test-utils

* Uncommented out & Add browserify_rails options

* re-add react-addons-shallow

* Fix syntax error from resolve conflicts

* follow up 59a77923

* Reorder javascript English locale file

 * Reorder translation string in order of the locale key.

* Add javascript English locale missing language keys

 * Search all javascript language keys by command:
   `grep -REho '<FormattedMessage .*\/>' ./app/assets/javascripts/.`

 * Add all the missing language keys and their values to `en.jsx`.

* Add javascript English locale missing language keys (2)

* Find all `defineMessages` calls with this command:
  `grep -Rl 'defineMessages({.*' ./app/assets/javascripts/.`

* Open all these files. Find the language key (`id`) in these
  statements.

* Add all the missing language keys and their values to `en.jsx`.

* Remove javascript English locale obsoleted language keys

 * Find all language keys that no longer exists in the source code
  and remove them. The removed keys include:

    * "compose_form.private"
    * "compose_form.unlisted"
    * "getting_started.about_addressing"
    * "getting_started.about_shortcuts"
    * "notification.mention"
    * "search.account"
    * "search.hashtag"
    * "tabs_bar.mentions"
    * "tabs_bar.public"

* Javascript English locale file add note

 * Add notes to contributors about the English translation files.
   Hope that will make translation process smoother.

* Update javascript locale defaultValue in code

 * Update the defaultValue in code according to the relevant
   translation in English locale file.

refreshes on navigation

loaded status; do not preload submitted statuses into community/public
timelines, unless those timelines have already been loaded; do not
close streaming API connections for community/public timelines, once
they have been established (most users navigate back to them eventually)

"whole known network" which is what public timeline used to be

Only domain blocks with suspend severity will block PuSH subscriptions
Silenced accounts should not appear in conversations unless followed

Make the streaming API also handle websockets (because trying to get the browser EventSource interface to
work flawlessly was a nightmare). WARNING: This commit makes the web UI connect to the streaming API instead
of ActionCable like before. This means that if you are upgrading, you should set that up beforehand.

redis-backed "mentions" timeline as redundant (given notifications)

the public timeline has been using

button takes you back to getting started page

This prevents the bug where if you go "back" to the UI after navigating to
another page it loads with the old set of statuses

Also upgrade react-redux to latest version. This is a performance update