User can edit torrents
* delete torrents
+ New translation string for mod panel and user edit torrent panel
+ Improvement of messages util with implementation of T (no need to get
Tfunc now, messages util do that for you)
+ Use of @ElegantMonkey GetCategories to generate select of categories
in search and forms
Added a new package, "categories", with the valid categories for each
Nyaa and Sukebei. On upload, check if the category is present on
the valid ones. Also changed the template function Category_Nyaa and
Category_Sukebei to reflect this.
