baseset: stop inheriting from built-in list class
The baseset is doing more and more smartset magic and using its list-like
property less and less. So we store the list of revisions in an explicit
attribute and stop inheriting.
This requires reimplementing some basic methods.
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
UNIX man page format and HTML. You'll need to install Docutils:
http://docutils.sourceforge.net/
Use the Makefile in this directory to generate the man and HTML pages.