* OEmbed support for PreviewCard
* Improve ProviderDiscovery code failure treatment
* Do not crawl links if there is a content warning, since those
don't display a link card anyway
* Reset db schema
* Fresh migrate
* Fix rubocop style issues
Fix#1681 - return existing access token when applicable instead of creating new
* Fix test
* Extract http client to helper
* Improve oembed controller
POST /api/statuses Params: status (text contents), in_reply_to_id (optional)
GET /api/statuses/:id
POST /api/statuses/:id/reblog
GET /api/accounts/:id
GET /api/accounts/:id/following
GET /api/accounts/:id/followers
POST /api/accounts/:id/follow
POST /api/accounts/:id/unfollow
POST /api/follows Params: uri (e.g. user@domain)
OAuth authentication is currently disabled, but the API can be used with HTTP Auth.