Rich Media support, part 2.

See merge request pleroma/pleroma!719

App list changes: Separate into two categories, and drop Subway Tooter.

See merge request pleroma/pleroma!731

remove unnecessary filter (re !723)

See merge request pleroma/pleroma!729

Correctly handle invalid credentials on auth login.

Closes #407

See merge request pleroma/pleroma!728

Closes #407

Update the openrc service's retry with the correct format

See merge request pleroma/pleroma!727

mastodon api: factor out status card fetching, move status card rendering to statusview, add opengraph extended data

/notice/:id - send the FE index even if 404

See merge request pleroma/pleroma!725

this allows to open private activities by URL when you are logged in,
and to let the FE display a 404 page

Views: wrap activity rendering in a rescue

See merge request pleroma/pleroma!723

Transmogrifier: fix incoming objects with invalid likes

See merge request pleroma/pleroma!724

this avoids complete timeline breakage when an activity fucks up
rendering.

add activities likes index, fixes favorites API call

See merge request pleroma/pleroma!722

Flake: random worker id

See merge request pleroma/pleroma!721

docs/Pleroma-API.md: Add note about emoji endpoints similarities

See merge request pleroma/pleroma!720