A stub is an article containing only a few sentences of text which is too short to provide encyclopaedic coverage of a subject, but not so short as to provide no useful information. Here a stub means that a new theme is started when some information is easily at hand which is put on the web site before waiting for the definitive article, which may never happen. The stub is very short and that people can add a lot more useful information. If you have any information to flesh out the subject please submit it.