Adding reference to the wiki on README

README.md

@@ -70,7 +70,7 @@ See the script `./xmenu.sh` for an example of how to use XMenu to draw a
 simple menu with submenus and separators.  The file `./demo.gif` shows how
 the menu generated by that script looks like.
 
-Read the manual for more information on running XMenu.
+Read the [manual](https://github.com/phillbush/xmenu/wiki) for more information on running XMenu.
 
 
 ## License