New repository.
Beginnings of twiki-org-mode.  Promote works!
Update twiki-org-regexp and font-lock-keywords to account for "---+!!" form.
Change regex to (perlish) "---(\++)", rather than "---+(\++)"; iow, "---+" is valid.
Adjust twiki-org-level calculation to account for extra, non-level-indicating characters.
Add twiki-outline-level to figure out the level we're on.
Set twiki-org-outline-regexp and font-lock-keywords to not to match lists.

For some reason, the original twiki-outline regexps would match both
"---+" and "   * " as headings.  The latter is definitely incorrect,
as that's the syntax for a bullet list.
Add twiki-org-demote and interactive call.  Not working yet.
Working twiki-org-demote.

Copied org-demote rather than just cut-and-paste org-promote and edit.
Add README.txt.
Add twiki-org-do-promote/demote.  Copied from org-mode.
Whitespace change.
Add hooks to run twiki-org-promote/demote for shift-left/right.

I had not realized that hooks would do the trick....much easier than
advice.
Return success so org's hook runner is happy.  FIXME: I'm doing this wrong.
Update.
Don't traverse the whole buffer to figure out the heading level.
Document what works.
Update TODO list.
Another bug.
TODO.