Fixed link to current CHANGES.txt into hg for the top level website.

Author: bernhardreiter

website/www/index.txt

@@ -31,4 +31,4 @@ Roundup was originally released as version 0.1.1 in late August, 2001. The first
     something different for a while. Roundup here I come... 
 
 .. _`download`: http://cheeseshop.python.org/pypi/roundup
-.. _`change note`: http://svn.roundup-tracker.org/viewvc/roundup/roundup/trunk/CHANGES.txt?view=markup
+.. _`change note`: http://roundup.hg.sourceforge.net/hgweb/roundup/roundup/raw-file/default/CHANGES.txt