v0.6.0-alpha.4

• Configurable destinations for downloads
  • Multiple destination directories can be configured
  • When queueing a download, an alternate destination can be selected
• When downloading from a playlist, show the total number of videos and how many have been downloaded
• Show version in web UI
• Improve index page (show URL of queued downloads instead of nothing)
• Fixes and improvements to capturing output info and showing it in the UI
• Show all log output in the popup
• Fixes to handling of queued downloads
• Fix portable mode to look in binary directory, not current directory
• Automatically cleanup download list, removing old entries automatically