Add support for phases
This adds a "publish" permission level (between "init" and "write") required to
be able to change the phase of a changeset from "draft" to "public".
Update documentation accordingly.
This is meant to be used for using the changeset evolution feature of mercurial,
see http://evolution.experimentalworks.net/doc/
Document: mercurial-server
Title: mercurial-server manual
Section: Programming
Format: HTML
Index: /usr/share/doc/mercurial-server/html/index.html
Files: /usr/share/doc/mercurial-server/html/*.html