Merge branch 'documentation-improvements' into 'develop'

Small documentation improvements

See merge request pleroma/pleroma!1001

diff --cc README.md
index 154abee40dc4052fda0cf502096763539634ebaf,8223afcb3cd0204cf4bf25a79fb9dd8163a375cf..c45190fc301b10979fb4ba2d1232c106980b7af0
--- 1/README.md
--- 2/README.md
+++ b/README.md
@@@ -8,9 -6,9 +8,9 @@@ Pleroma is a microblogging server softw
  
  Pleroma is written in Elixir, high-performance and can run on small devices like a Raspberry Pi.
  
- For clients it supports both the [GNU Social API with Qvitter extensions](https://twitter-api.readthedocs.io/en/latest/index.html) and the [Mastodon client API](https://github.com/tootsuite/documentation/blob/master/Using-the-API/API.md).
+ For clients it supports both the [GNU Social API with Qvitter extensions](https://twitter-api.readthedocs.io/en/latest/index.html) and the [Mastodon client API](https://docs.joinmastodon.org/api/guidelines/).
  
 -- [Client Applications for Pleroma](docs/Clients.md)
 +- [Client Applications for Pleroma](https://docs-develop.pleroma.social/clients.html)
  
  No release has been made yet, but several servers have been online for months already. If you want to run your own server, feel free to contact us at @lain@pleroma.soykaf.com or in our dev chat at #pleroma on freenode or via matrix at <https://matrix.heldscal.la/#/room/#freenode_#pleroma:matrix.org>.