changed: When checking for eg. user thumbs just check whether it's either a folder or a video file
changed: Clarify the special case for DVD stuff + always store details from player for other items)
changed: Only update item's streamdetails if the ones from the player are not empty
added: = & != operator for CStreamDetails
fixed: Make sure player as actually playing video else we may update eg. streamdetails with invalid info
changed: Compare streamdetails from the db and the item to determine whether db needs updating