Poster change + other

Release include
   . automatic xml file download using 2 week cache (use aid:xxxxx with aid being the anidb id in the url if serie not picked up)
   . Correct TVdb season posters downloaded for poster and season
   . AniDB poster if selected present at the end
   . Moved XML to Data folders for troubleshooting, gets pulled from the cache, but you can cross reference logs that way
   . local cache for mp3 themes using AniDB id.mp3 convention. If replaced with full theme, would pick that one first