Muffin NEWS - user-visible changes

Changes since 0.3:

* New Filter API.

* Content filtering via the ContentFilter interface.

* A real proxy server is not required.  In fact, Muffin can
  actually use another Muffin as a proxy.

* A window system is no longer required.

* Muffin and filter options can be saved across sessions.

* See muffin.html.HtmlTokenizer and the Test filter for
  work done so far on HTML filtering.

* New web site http://muffin.doit.org/.
