v0.22.0

Added

• An addon whose _index.json says "automount": true is served from its own pages/ at /@{alias}. The page is read-only, needs no mount or page in site/pages/, and has no registry row.
• App::isAutomount($alias) tells whether an addon is automounted.

Changed

• Icons, fonts and Clockwork are automounted: /@icons/sprite, /@fonts/{file} and /@clockwork. Their mount entries are gone from phlat/config.json, and the fonts template reads p('@fonts').
• A mount on an automounted addon, or a site page with its view, is an error.
• Request accepts @ in the first path segment.
• PageFiles resolves an automounted addon's files by the uuid in its pages/_index.json.
• The admin and theme editor stay mounted, as they have fields to edit.