I think the linked css here should be for all media? For instance, if we generate two columns, we want to do so for print not just screen media, I should think????
Added a column to portal_datasources so datasources can specify a directory from which .css files should be linked to from the HTML <head> chunk of the web page. Then I added the code to emit said link. And tested it for Oracle and PG, fresh installs and upgrades both.