* Add <ostatus:conversation /> tag to Atom input/output

Only uses ref attribute (not href) because href would be
the alternate link that's always included also.

Creates new conversation for every non-reply status. Carries
over conversation for every reply. Keeps remote URIs verbatim,
generates local URIs on the fly like the rest of them.

* Conversation muting - prevents notifications that reference a conversation
(including replies, favourites, reblogs) from being created. API endpoints
/api/v1/statuses/:id/mute and /api/v1/statuses/:id/unmute

Currently no way to tell when a status/conversation is muted, so the web UI
only has a "disable notifications" button, doesn't work as a toggle

* Display "Dismiss notifications" on all statuses in notifications column, not just own

* Add "muted" as a boolean attribute on statuses JSON

For now always false on contained reblogs, since it's only relevant for
statuses returned from the notifications endpoint, which are not nested

Remove "Disable notifications" from detailed status view, since it's
only relevant in the notifications column

* Up max class length

* Remove pending test for conversation mute

* Add tests, clean up

* Rename to "mute conversation" and "unmute conversation"

* Raise validation error when trying to mute/unmute status without conversation

* Normalize locales

* Restore "mention" locale key

* Update Norwegian translations

* Updated no.json
* Updated activerecord.no.yml
* Updated no.yml
* Updated simple_form.no.yml

* i18n: fix Unicode character error in no.yml

* Javascript escaping code "\uD83D\uDC18" should be "\U0001f418" in
Ruby / yml

* i18n: remove unused keys in Norwegian translation

* Remove unused keys in no.yml and activerecord.no.yml
  by running: `bundle exec i18n-tasks remove-unused no`

* Add missing keys in activerecord.no.yml and no.yml by
  running: `bundle exec i18n-tasks add-missing no`

* i18n: escape the key 'no' in activerecord.no.yml

* Add Japanese tranlsation for getting started, and run manage:tranlation

* remove unnecessary {apps}

* When streaming API is disconnected, poll home/notifications
Display slightly different empty home timeline message if user is following others
Cull notifications to 20 items when over 40 get added in real-time
Run manage:translations

* Optimize <HomeTimeline /> a little

* 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

* Working translation for Norwegian.

* Fixes to Norwegian translation.

* Further adjustments to Norwegian translation.

* Further adjustments to Norwegian translation.

* Yet more improvements to the Norwegian translation.

* More Norwegian translations. Better terminology.

* Working translation for Norwegian.

* Fixes to Norwegian translation.

* Further adjustments to Norwegian translation.

* Further adjustments to Norwegian translation.