* Get rid of mechanize, fully switch to Danbooru::Http
* Switch to mobile api, improving speed
* Merge main and manga clients
* Add full support for manga pages
* Add support for anonymous and r-15 images
* Don't fail when attempting to upload oekaki direct links
* Various misc fixes
* Move the source normalization logic out of the post model
and into individual sources' strategies.
* Rewrite normalization tests to be handled into each source's test,
and expand them significantly. Previously we were only testing
a very small subset of domains and variants.
* Fix up normalization for several sites.
* Normalize fav.me urls into normal deviantart urls.