The server should expose user feeds as RSS / other feed formats.

[NfNitLoop]

Right now the server makes users' posts and feeds available as plain HTML, and as data accessible via the FeoBlog REST API.

However, to allow consuming a FeoBlog blog from third party systems like feed readers, we should also expose the feeds as RSS, and/or Atom, and/or JsonFeed.

• should link to the plain HTML version of the page. (But see #22)
• Should probably only serve blogs of "server users", so that folks can't accidentally start following a feed that doesn't actually get regularly updated on this server.
• Maybe even further limit to only users on the homepage? Or add as a per-user option? Need some consideration here.