Revert "(#2035) - get rid of cors proxy"

This reverts commit 9d4435de21d996a0a2271a217479af916be05519.
(#2275) - fix overflow-x in chrome

The github ribbon needs to be contained!!11
(#2269) - Update faq.md

Fixed a missing ' on the last item of CouchDB Differences.
(#2276) - fix non-standard splice() usage
(#2245) - bump version number in version-browser.js
(#2271) - better docs for db.info()
(#2263) - test changes() without a complete callback
(#2109) - better error message when no adapters available
(#2190) - remove LEVEL_BACKEND, build adapter plugins
(nick-thompson/express-pouchdb#42) - fix metadata.id

So don't ask me why, but occasionally metadata
is undefined here, so this throws an error in
PouchDB server when you run npm test against it.
Related to #2282.