- Only adds .jpg for Imgur links, closes#2
- Performs HTTP requests to retrieve the MIME type and size of all
images, falling back to a set of known images and zero length for
failing requests, and adds caching to avoid flooding, closes#3
- Drops the use of `mensch` and instead reads straight from the
IRC log without a week fliter, closes#4
- Adds mod_syndication and skipDays, closes#5