add forum link

Author: ronie

addon.xml

@@ -14,7 +14,7 @@
 		<description lang="en">Create and edit custom library nodes.</description>
 		<license>GNU General Public License, v2</license>
 		<language></language>
-		<forum></forum>
+		<forum>http://forum.kodi.tv/showthread.php?tid=224512</forum>
 		<source>https://github.com/XBMC-Addons/plugin.library.node.editor</source>
 		<email></email>
 	</extension>