started work on 2.0.5

It was a pleasure to get back to code, though with dirty dishes to wash, laundry and unpacking, I didn't get too much more done than the match command (previously tagmatch).

But it went well. Next step is to enhance the cls display to show the matches, and then (the critical piece) to update the logic for resolving topics and for listing visible topics.

I expect 2.0.5 will be in beta pretty quickly--perhaps by this weekend.