Changes to <episode> <nameshort> <desclong>

Insert <episodenum> in <episode> title wherever possible
Use <brand> for <nameshort>
Leave whitespace in <desclong> with --playlist-metadata
Added tagging options for new metadata processing

--tag-longepisode: Use <episode> instead of <episodeshort> for track title
--tag-longtitle: Prepend <series> (if available) to track title. Ignored with --tag-fulltitle
--tag-shortname: Use <nameshort> instead of <name> for album/show title
--tag-isodate: Use ISO8601 dates (YYYY-MM-DD) in album/show names and track titles
Tidy XML::Simple warnings
Ignore --quiet with --stdout