* Add helper method to return Setting.site_title

* Use site_title helper in application layout

* Use site_title value for og:site_name

used from nginx when Rails fails.

removing web app capability from non-webapp pages

See: https://dequeuniversity.com/rules/axe/2.1/html-has-lang

registration API

a basic home timeline

DistributionWorker. That isn't the heaviest service, yet, but gotta start
somewhere

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.