notes, was Re: What's cooking in git.git (Mar 2009, #02; Thu, 05)

> * js/notes (Wed Feb 18 11:17:27 2009 -0800) 14 commits
>  - tests: fix "export var=val"
>  - notes: refuse to edit notes outside refs/notes/
>  - t3301: use test_must_fail instead of !
>  - t3301: fix confusing quoting in test for valid notes ref
>  - notes: use GIT_EDITOR and core.editor over VISUAL/EDITOR
>  - notes: only clean up message file when editing
>  - handle empty notes gracefully
>  - git notes show: test empty notes
>  - git-notes: fix printing of multi-line notes
>  - notes: fix core.notesRef documentation
>  - Add an expensive test for git-notes
>  - Speed up git notes lookup
>  - Add a script to edit/inspect notes
>  - Introduce commit notes
> 
> Rebased and then kicked back to 'pu' to give the author a chance to
> rearrange if necessary.  I might do some trivial squashing myself.