Fix #463 - Fetch and display previews of URLs using OpenGraph tags

Gemfile

Gemfile.lock

app/assets/javascripts/components/actions/cards.jsx

app/assets/javascripts/components/actions/statuses.jsx

...avascripts/components/features/status/components/card.jsx

...components/features/status/components/detailed_status.jsx

.../components/features/status/containers/card_container.jsx

app/assets/javascripts/components/reducers/cards.jsx

app/assets/javascripts/components/reducers/index.jsx

app/assets/stylesheets/components.scss

app/controllers/api/v1/statuses_controller.rb

app/models/preview_card.rb

app/models/status.rb

app/services/fetch_link_card_service.rb

app/services/post_status_service.rb

app/views/api/v1/statuses/card.rabl

app/workers/link_crawl_worker.rb

config/application.rb

config/initializers/inflections.rb

config/routes.rb