Forum Dl Versions Save

This release enables forum-dl to be used to download files (in particular, images) from forums much like gallery-dl does for gallery sites.

• Embedded objects (images, audio, videos, etc.) are now downloaded
• Output to stdout by default (-o - is not necessary anymore)
• New options:
  • --files-output DIR -- save all downloaded files in DIR
  • --no-files -- disable saving of files
  • --outside-files -- also save files outside posts (e.g. forum banners)
  • --timeout -- set HTTP request timeout