Added "group" attribute to menus & views
GROUP access control is now OWNER_GROUP (auto-migrated)
GROUP now checks the user is in the "group" perm. group
http://dev.bukkit.org/bukkit-plugins/scrollingmenusign/tickets/73-better-permissions/
Version => 2.4.0-SNAPSHOT
Ensure the item version of wood door is used for back icon.
Block version has no texture any more.