(#2403) - fix up sync/replication docs
(#2511) - add Pouch Mirror and Filter Pouch to external.md

Another day, another PouchDB plugin. :)
(#1993) - Added version to download button
(#2509) - fix unintentional italics
(#2494) - fix local doc get/put/delete
(#2517) - don't mutate host.headers
(#2517) - add test for mutated headers
(#2519) - increase selenium timeout
(pouchdb/mapreduce#191) - add migration test
(#2469) - blog post about PouchDB + LevelUP
(#2507) - update FAQs, add more db compatibility info
(#2469) - Fix the publish date of levelup blog post
(#2512) - Added justified step to navigation
(#1932) - Follow up to fix links to blog