Script Summary: Provies persistent filtering for subreddits
Provides filters for self-links, non-self-links, and NSFW links, on the right side under the search bar. Changes are per subreddit; you can filter a particular type of content for a particular subreddit. Changes are persistent, they survive multiple browser sessions.
Changes propogate to the main page/"all" subreddit - if you filter NSFW links in the "pics" subreddit, then NSFW links from the "pics" subreddit will not appear on the main page/"all" subreddit either.
