* Remove unused method #set_counters_maps from api controller

* Remove unused method #set_account_counters_maps from api controller

* Remove unused method Account#followers_domains

* Remove unused User.prolific scope

* Add mastodon:users:admins task to list all admin emails

* Use interpolated query style in Account.triadic_closures

* Coverage for Account.triadic_closures

Sign-in redirects you back to last visited URL, but in case of API requests,
this sometimes redirected users to an API URL that, of course, greeted them
with an {"error":"The access token is invalid"}

(Because postgres can tell that count(*) needs no extra checks, but
counting a specific column requires them)

before loading new one, cache notifications API, fix missing follow button
on public profiles

resources that require a user context vs those that don't (such as public timeline)

/api/v1/statuses/public   -> /api/v1/timelines/public
/api/v1/statuses/home     -> /api/v1/timelines/home
/api/v1/statuses/mentions -> /api/v1/timelines/mentions
/api/v1/statuses/tag/:tag -> /api/v1/timelines/tag/:tag

add permissive CORS to API controllers

to the API

Also fix reloading of timelines after merge-type events

production as it's very verbose and not very useful

registration API

Adding better errors for the API controllers, posting a simple status works from the frontend now

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.