Agora 0.5.1

• Announcement: https://twitter.com/flancian/status/1327694477457289222 pull.
• Added notion of 'subnode': a particular note by a particular user. subnodes agregate up to 'nodes': nodes are the set of all subnodes about a given entity (by default, subnodes with the same title).
• Added users page.
• Nodes page now lists the size of the node (number of subnodes).
• Added subnode-viewing mode, in which you can see just notes (files actually) by a particular user (and link to them).
  • Example: https://anagora.org/subnode/garden/flancian/agora.md pull
• Integrated one more garden, that of [[pen-coded]].
• Previously:
  • dev environment is now available (when up) at http://dev.anagora.org pull.
  • Moved dev/prod to separate 'https://flancia.org/go/agora' pull and 'https://flancia.org/go/agora-server' pull repos.