New module "debug", with debug narrator packages.
Variant of Colin McCormack's Debug wub utility package.
Split into parts:
- Core, extended for global and per-tag prefixes and suffices, plus
  per-line header/trailer for multi-line messages.
- Timestamping as prefix service.
- Eventloop heartbeat
My own
- Caller information as prefix.
Added core dependency to the helper packages.
Fixed oops where I overwrote the persistent state subst results. :(
Fixed oops of timestamp not returning the time.
Implemented the "define" command.
Added documentation, and "pdict" method.
Merged new module and package for debug narrative.
Updated embedded documentation.
Fix manpage headings
Merged doc fix and updated embedded.