Aggregator item promotion

Based on the core aggregator module, makes it possible to "promote" hand-picked items to nodes of the admin's choosing. There are numerous fine node based aggregator modules. This one does not aggregate feeds to nodes, but instead allows for case-by-case hand-picking of aggregator items, so that only certain items become nodes.

The nodes are also independent form the feed items after the "promotion", so if the then created node is used on the site in a news feed or some other listing, it will stay the same and not update with changes from the feed.

Posts are always set to 'Published' when created, and the Author is set to the user ID of the admin who creates them. Editing of the node is possible from then on of course.