phab-refresh: use a special comment on the stable branch
Phabricator make it hard to spot the branch information. As a result patch
intended for stable are consistently queued for default.
We add a special command and flashy GIF to try to attract reviewer attention on
the fact patch are intended for stable.
Differential Revision: https://phab.mercurial-scm.org/D10464
Mercurial's documentation is kept in reStructuredText format, which is
a simple plain text format that's easy to read and edit:
http://docutils.sourceforge.net/rst.html
It's also convertible to a variety of other formats including standard
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http://docutils.sourceforge.net/
Use the Makefile in this directory to generate the man and HTML pages.