Revision 600

* www/homepage.sgml:  Update for 0.6.16

* www/download.sgml: s/Sketch/Skencil/.  Update for 0.6.16

* www/mainpage.sgml: Add newsitem for 0.6.16.

* www/mainpage.sgml, www/oldnews.sgml: Move some older news items
from the main page to oldnews.sgml

* www/Images/skencil-logo-small.png: Update to the logo used in
0.6.16

* www/relnotes.sgml: s/Sketch/Skencil/

* www/NEWS: Update to the version of 0.6.16

* tools/misc/news.py (rx_version): Recognize Skencil too