more wip
Last few commits have been various fixes and improvements:
- make launch faster by trying default username & password w/o prompting
- add some conveniences to c script and various classes (adding package
  names and making things public etc) to relaunch more quickly after mods
  (but 3 compile errors just popped up out of the blue): access to members
  is different from the REPL than from compiled code, and these used
  to be working from the REPL; compiled is OK.  Cause unknown.
  When those are fixed, fewer things have to be public than now.
- make jline work better with text entry, so that one can
  now press ESC to leave any menu or entry field. This was a pain and
  involves some code that could go away if tests written and mods merged
  with the upstream.
- bugfixes.