multiple node types

Was looking at the code and noticed it had group by for node type theorictically allowing for add forums for multi node types. Don't think that'll work.

Bit too tired to explain, but here's a patch to allow for multi node types in the settings; not using group by (since won't get what hasn't been added for add forums) however some of the changes should likely also relate to the group by, ie the $node vs $newnode; using the $node repeativally caused for same $node repative since $node = stdClass is a object, stored as object/reference so basically entering same node over and over, any changes last. Need to clone it to work.

Haven't tested it yet