core (pages redirection): inverted redirection + getSubPageURL: - page redirection now also work in other redirection meaning that if "/redirecting_url" => "/page_name/arg_1/arg_2" is used, a getURL(page_name, arg_1, arg_2) will return the redirecting_url. query_args are not handled yet by getURL. - page redirection dict now use path_args and query_args insteand of args and kwargs, which show the relation with URL. - new getSubPageURL return absolute URL to a subpage, which is more solid than relative URL and allows to use it in sub-hierarchy.