Add OEmbed parser

See merge request !661

Activitypub c2s likes

See merge request pleroma/pleroma!658

Fix nginx caching issues

See merge request !654

mrf: add no placeholder-text policy, strips pointless "." content from posts with images

See merge request !662

Add link headers and honour parameters on Mastodon API /favourites

See merge request !659

Top level of the likes OrderedCollection is inlined to get immediate
access to totalItems. Because the count can be returned without scanning
the database for like activities the extra query is saved when the
client only wants to display the total.

Activities returned from inbox can include other types of objects like
Article

As documented at https://docs.joinmastodon.org/api/rest/favourites/

Unpin when deleting a status

See merge request !655

Fix spellign.

See merge request !656

Nginx is currently not caching data because proxy_buffering needs to be
enabled for caching to work at all, and we are receiving a Cache-Control
header from Pleroma that states "max-age=0, private, must-revalidate"

Even disregarding the Cache-Control header that should actually be set
to "public, max-age=1209600" as defined in the reverse_proxy code, we
don't want to obey this header at all as it overrides our Nginx caching
rules.

Fix varnish chunked and general improvements

See merge request !653

Support activity+json request for activity

See merge request pleroma/pleroma!641

This enables caching/streaming of chunked responses

Support more filetypes for caching static media

Add Twitter Card parser

See merge request !643

Twapi follower pagination

See merge request !648

common api: fix newlines in markdown code blocks

See merge request !651

ok @lanodan

Pinned Statuses

Closes #440

See merge request !636

Mass follow

See merge request !642

Add activity visibility index.

See merge request !646

Alpha sort the restricted nicknames

See merge request !650

Rich media: Remove :commit since a tuple is already returned

See merge request !649