Addon id for ui_web

Change-Id: I373c81296f5810ae7b16be3a2b907add32f22364
Reviewed-on: http://gerrit.dmdirc.com/617
Automatic-Compile: Gregory Holmes <greg@dmdirc.com>
Reviewed-by: Gregory Holmes <greg@dmdirc.com>

src/com/dmdirc/addons/ui_web/plugin.config

   metadata
   version
   defaults
+  updates
 
 metadata:
   author=Chris <chris@dmdirc.com>
 provides:
   web ui
 
-permanent:
-  *
+updates:
+  id=29
 
 defaults: