v1.0.0-beta2

This release:

• Fixes a bug where trailers named "Trailer 1" were not downloaded with the video_type setting set to single_trailer.
• Adds the download_all_urls setting. This allows the user to do something like only download Trailer #1 for most movies (with the video_types = single_trailer setting), but for movies the user is really interested in, to download all videos.
• Improves the code style.