added Network Theory Ltd (as per unanswered February mail)

svn path=/trunk/; revision=11218

donate/donors/donors-2008.en.xml

@@ -59,6 +59,7 @@
     <li>Marc Riese</li>
     <li>Matthew Frederick Exon</li>
     <li>Michael Mosmann</li>
+    <li>Network Theory Ltd.</li>
     <li>Oskar Welzl</li>
     <li>Roland Hafner</li>
     <li>Roger Trias Sanz</li>