Import isse tracker, mailing list and dev page info from sourceforge

Issue 322 describes initial support for importing doap from sourceforge. 
Unfortunately the data does not conform to the DOAP schema entirely.

In order to grab bud-database and mailing list info we will need to munge the 
data on import.

For example, bug databases are stored as:

    <bug-database>
        <sf:Tracker>
            <name>Bugs</name>
            <rss:channel rdf:resource="http://sourceforge.net/api/artifact/index/tracker-id/430288/rss" />
            <foaf:page rdf:resource="http://sourceforge.net/tracker/?group_id=40417&amp;atid=430288" />
            <sf:total-count>301</sf:total-count>
            <sf:open-count>16</sf:open-count>

        </sf:Tracker>
    </bug-database>

We need to extract the useful info here (an RSS feed and the issue tracker URL)

Similarly we need to extract useful info from the mailing list:
<sf:feature>
  <sf:Feature>
    <name>Mailing Lists</name>
    <foaf:page rdf:resource="http://sourceforge.net/mail/?group_id=40417" />
  </sf:Feature>
</sf:feature>

and from the the following sf:Features:

Project Web
MediaWiki

Original issue reported on code.google.com by ross.gardler on 10 Aug 2010 at 2:30

Blocked on: #322

HughP / simal

Import isse tracker, mailing list and dev page info from sourceforge #342