docs: update with current status

README.md

@@ -1,6 +1,11 @@
-A simple, customisable table audit system for PostgreSQL implemented using
-triggers.
+A simple, customisable table audit system for PostgreSQL implemented using triggers.
 
-See:
+[Here's more information about this project](http://wiki.postgresql.org/wiki/Audit_trigger_91plus)
 
-http://wiki.postgresql.org/wiki/Audit_trigger_91plus
+# Maintenance Status
+
+This repo is meant to be a demo more than a ready-to-run extension. PRs are not accepted, although if you'd like to list your fork, please submit a PR to do so.
+
+# Forks
+
+* https://github.com/iloveitaly/audit-trigger - [contains a bunch of PRs](https://github.com/2ndQuadrant/audit-trigger/pull/48) including using jsonb for storage, function to stop auditing a table, option to not track inserts, and including pk ids in the audit table.