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

[ci skip]

MastodonAPI multi-hashtag

See merge request pleroma/pleroma!652

Web.MastodonAPI.AccountView: Add is_moderator and is_admin

Closes #557

See merge request pleroma/pleroma!718

Closes: pleroma/pleroma#557

rich media: minor hardening

See merge request pleroma/pleroma!717

Change webpush endpoint to unlimited varchar

Closes #552

See merge request pleroma/pleroma!716

Fixes #552

Flake: support integers in from_string/1

See merge request pleroma/pleroma!715

Some previously issued stateless tokens have integer ids in them.