[Feature] categorized output to dlna devices.

[dieug]

now torrserver on dlna doesn't sort torrents in any ways but alphabetic
now i see on tv dlna menu like:
Torrserver->
torrents->
list of torrents (each as folder without differences, movies, series, music, etc):

but:
in web-interface i see categories:
movies
series
music
others

looks more comfortable make this sorting by categories, which torrserver has in web-iface
dlna:
Torrserver->
torrents->
movies: movies folders
series: series folders
music: music folders
others: others folders

etc.

according to torrserver's web-categories.

may be, in addition, give possibility for user to make own categories.