Update api docs

From http://danbooru.donmai.us/wiki_pages/43568
#1866: support sankakucomplex source redirection

hopefully prevents error 1011 from cloudflare; takes into account different subdomains and the original, preview, and sample files
update #1866 limit sankakucomplex subdomains

followe up to 1119211db098737fa33deb03f2caae0355d1b39d; limit to available subdomains, only c3 is in the database so far
new version
fixes #2185
more lenient regexp for #2185
add shortcut for currentuser.admin
#1866: support for zerochan & minitokyo

redirect to full sizes in respective domains; users still need to register in these sites in order to view *some* posts; those tagged 'ecchi' in zerochan can't be used anonymously
#2185: Mention on importer page help
Fix bug where failed iqdb query would be made

Query should only be made automatically when using bookmarklet
fixes #2190
Merge branch 'bulk-update-requests'
potential fix for #2192
#2188 move share section
fixes #2185
implement saved searches, move user boolean settings to bitprefs