How to make it easier to suggest documentation

[Marcus Macauley]

I had a documentation suggestion (my first), and it made it through to lilypond-
devel, but two hurdles stood made it more difficult than it needed to be, and 
might turn away less persistent users.

One, I didn't know (and couldn't easily find) how to suggest documentation. 
Two, Gmane wrongly complained of "top-posting", and it took me 20 minutes to 
figure out how to circumvent it.

These two hurdles could be eliminated thus:

One, add a link to
http://lilypond.org/web/devel/participating/documentation-adding
(something like "Have a suggestion for how to improve the documentation? See 
here[link].")
...in these places:
http://lilypond.org/web/documentation.html
http://lilypond.org/doc/v2.9/Documentation/

Two, update the listinfo for lilypond-devel
http://lists.gnu.org/mailman/listinfo/lilypond-devel
and perhaps the other lists as well, by adding a note such as the following, as 
suggested by Sietse Brouwer:

"NB: When posting a LilyPond snippet, the form may tell you that you are "top 
posting". Solve that by putting a line that starts with > at the top of your e-
mail."
(http://lists.gnu.org/archive/html/bug-lilypond/2006-05/msg00038.html)

Cheers,
Marcus