(#2206) - Replace goodfirstpatch with help wanted
(#2185) - Add ie to allowed failures
(#2185) - Fix typo in travis.yml file
(#1131) - Document expected _local 404 thrown
(#1622) - test in phantomjs

Also add the ability to specify whether or
not to use the ES5 shims, since phantomjs
needs them.
(#2193) - deprecate latest for now
(#2250) - fix small leveldb memory leak
(#2246) - Rename publish.sh to release.sh
(#2242) - remove custom events dep
(#2231) - document pouchdb-plugin-seed
(#2229) - fix wrong code in blog post
(#2238) - document replication error listener, add examples
(#2190) - new page about adapters

Do not merge this until #2190 is merged
and settled, since it introduces new
API concepts.

This adds a page that explains all about
the various backends and how you can use
them in different environments. Gimme a
PR if I forgot anything.