New Backend for talk.neptune.cash

The domain name talk.neptune.cash now points to this forum, which is an instance of Discourse. This forum replaces the old one which is (for now) still available at old-talk.neptune.cash.

Freedit, the software powering the old forum, has many things running for it. However, in the end we decided that the relatively high cost of maintenance was slowing us down too much.