composer/composer — pull request #1174 by szeber (2012-10-02 11:47:15+00:00)
Title: Mercurial bookmarks support

Added support for mercurial (hg) bookmarks, which closely resemble git branches in hg. They are commonly used when synchronizing hg and git repositories.
They are treated the same as named branches. In case of a mixed use-case where both named branches and bookmarks are used named branches take precedence.

For more info about bookmarks see http://mercurial.selenic.com/wiki/BookmarksExtension