v1.0.0-beta3

This release:

• Fixes a crash when there's a movie in the "Just Added" feed that doesn't have a page yet.
• Improves handling of video titles with extraneous spaces (like "Trailer ").
• Changes the behavior of the video_types = single_trailer setting. Now if there is no "Trailer" or "Trailer 1" for the movie, but there is some other trailer called "Trailer 2" (or "Trailer 3", etc), then the script will download that trailer. If a "Trailer 1" is then added later, the script will not download this trailer, because it has already downloaded a trailer for the movie.