[ticket/11103] Output the notifications to the template

For now, just dumping the notifications in the header.

PHPBB3-11103

phpBB/styles/prosilver/template/overall_header.html

@@ -166,3 +166,10 @@
 			</div>
 		</div>
 		<!-- ENDIF -->
+
+<!-- BEGIN notifications -->
+	<p>
+		<a href="{notifications.URL}">{notifications.TITLE}</a><br />
+		{notifications.TIME}
+	</p>
+<!-- END notifications -->