Noted in @shtylman's #3898, API stability notes are easy to overlook
in the html documentation. This can be especially troublesome if the API
is deprecated. This commit gives visual feedback by adding in a class
to the html docs when they're generated. The API headers with
corresponding colors are also listed in the 'About this Documentation'
page for easy reference.
This puts all images in doc/images/ and references them via
http://nodejs.org/images/.
Any complaints about copyright usage etc. can thus be node/joyent's
problem, rather than the problem of a downstream distribution channel.
Conflicts:
Makefile
Modify doctool.js to automatically create anchor links for
every function, for easy linking.
Include support for functions that have a <h4> level
Fixes: #1718.
