[PATCH] Random documentation fixes

[PATCH] Random documentation fixes

The fixes focuses on improving the HTML output. Most noteworthy:

 - Fix the Makefile to also make various *.html files depend on
   included files.

 - Consistently use 'NOTE: ...' instead of '[ ... ]' for additional
   info.

 - Fix ending '::' for description lists in OPTION section etc.

 - Fix paragraphs in description lists ending up as preformated text.

 - Always use listingblocks (preformatted text wrapped in lines with -----)
   for examples that span empty lines, so they are put in only one HTML
   block.

 - Use '1.' instead of '(1)' for numbered lists.

 - Fix linking to other GIT docs.

 - git-rev-list.txt: put option descriptions in an OPTION section.

Signed-off-by: Jonas Fonseca <fonseca@diku.dk>
Signed-off-by: Junio C Hamano <junkio@cox.net>