* Redesign extended information page

* Remove unused keys

* Add $ui-base-lighter-color variable to SCSS

* Redesign the landing page, mount public timeline on it

* Adjust the standalone mounted component to the lacking of router

* Adjust auth layout pages to new design

* Fix tests

* Standalone public timeline polling every 5 seconds

* Remove now obsolete translations

* Add responsive design for new landing page

* Address reviews

* Add floating clouds behind frontpage form

* Use access token from public page when available

* Fix mentions and hashtags links, cursor on status content in standalone mode

* Add footer link to source code

* Fix errors on pages that don't embed the component, use classnames

* Fix tests

* Change anonymous autoPlayGif default to false

* When gif autoplay is disabled, hover to play

* Add option to hide the timeline preview

* Slightly improve alt layout

* Add elephant friend to new frontpage

* Display "back to mastodon" in place of "login" when logged in on frontpage

* Change polling time to 3s

* Fix embedded SVG fill attribute

SCSS darken/lighten functions may not return a color value, but a color
name like "white".  See following example:

https://www.sassmeister.com/gist/c41da93b87d536890ddf30a1f42e7816

This patch will normalize $color argument to FFFFFF style.

I also changed the function name from "url-friendly-colour" to
"hex-color", Because...

1. The name "url-friendly" is not meaningful enough to describe what it
   does.

2. It is familier to me using "color" rather than "colour"

    kojima:kojiMac mastodon[master]$ git grep -l colour
    app/javascript/styles/boost.scss
    spec/fixtures/files/attachment.jpg

    kojima:kojiMac mastodon[master]$ git grep -l color
    .rspec
    .scss-lint.yml
    Gemfile.lock
    app/javascript/mastodon/features/status/components/action_bar.js
    app/javascript/styles/about.scss
    app/javascript/styles/accounts.scss
    app/javascript/styles/admin.scss
    app/javascript/styles/basics.scss
    app/javascript/styles/boost.scss
    app/javascript/styles/compact_header.scss
    app/javascript/styles/components.scss
    app/javascript/styles/containers.scss
    app/javascript/styles/footer.scss
    app/javascript/styles/forms.scss
    app/javascript/styles/landing_strip.scss
    app/javascript/styles/reset.scss
    app/javascript/styles/stream_entries.scss
    app/javascript/styles/tables.scss
    app/javascript/styles/variables.scss
    app/views/admin/subscriptions/_subscription.html.haml
    app/views/layouts/application.html.haml
    app/views/layouts/error.html.haml
    app/views/manifests/show.json.rabl
    bin/webpack-dev-server
    config/initializers/httplog.rb
    public/500.html
    public/emoji/1f1e6-1f1e8.svg
    public/emoji/1f1ec-1f1f8.svg
    public/emoji/1f1f3-1f1ee.svg
    public/emoji/1f1fb-1f1ec.svg
    spec/fixtures/requests/idn.txt
    yarn.lock

* Add semicolon

- Updates scss variables file to use better-named variables for black/white/etc
- Arranges the "mastodon classic" colors into variables
- Remove all references to `$color-*` naming, replacing with new

This does not in itself introduce "theme" support, but:

- It would probably be easier to start working on theme support after this
  change and others
- Even without the goal of themes, these changes make it more clear how the
  colors are being used.

There is almost definitely some edge case in here where I've guessed the
intent/context of some color usage incorrectly, but it still seems like a net
improvement.

* 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

Set status action bar to have display flex and center align items so dropdown icon appears center aligned with other icons. Make styles alpha organized.

Add hover state to boost icon - lighten color on hover.