reorganize artist version search methods
fixes #1330
fixes #1327
fixes #1225
potential fix for #1305
Merge branch 'master' of github.com:r888888888/danbooru
remove cached tags.json
add support for banning/unbanning posts
fixes #1300
partial fix #1199
fix typo
Revert "partial fix #1199"

This reverts commit f4492a0d99f897e1d48a58696bbedf0c5c7a7ad1.
fix tests
Merge branch 'master' of github.com:r888888888/danbooru
fix routes
update version
update version
possible fix for issue #1340

added paragraph tag containing post.tag_string as child element of div inside content; also, as minor edit, modified post/atom to posts.atom and post/index to posts in the link href.
fixes #1251
Fixes #1339, test commit