A connector object, generated by wiki_con, that corresponds
to the project you're trying to query.
pages
A vector of page titles, with or without spaces, that you want to retrieve
categories for.
properties
The properties you want to retrieve about the categories.
Options are "sortkey" (the key that sorts the way the page is stored in each category),
"timestamp" (when the category was added to that page) and "hidden" (tags those categories
in the returned li
limit
The maximum number of categories you want to retrieve for each page. Set
to 50 by default.
show_hidden
Whether or not to include 'hidden' categories in the categories
that are retrieved - these are usually associated with the maintenance of Wikipedia
and its internal processes. Set to FALSE by default.