(#2414) - Add note for the complete event used  with live changes
(#2430) - bulk documentation
(#2462) - Fix API documentation for cache constructor option

Updated the documentation for new PouchDB's cache option.
The flag is a sub property of the ajax option, not a top
level option.
(#2207) - provide additional information about the db.compact() method

Give some high-level information about the compaction operation itself,
highlight its availability only with the http adapter. Provide a link
to CouchDB's docs for more low-level detail.
(#2458) - explicitly mark idb changes as readonly

I had to Google for awhile before I figured out that
the default is readonly. This is the only case where
we're not being explicit.
(#2424) - add cors credentials to errors.md

Forgot to add this when I originally wrote this
error page. Not every user will use credentials,
but it's probably better to just have them enable
everything and then tweak it later after it works.
(#2435) - disable saucelabs for now

*in the distance, the sound of a bugler mournfully
playing Taps can be heard*
(#2428) - fix args for remove()

It turned out there were a lot of argument
combinations that we weren't checking in the
tests, which is probably why this one slipped
through.

In addition, I added a fix to make it so you can
specify the rev in the options, and it'll use that
if the _rev isn't defined in the document. This is
not something I want to advertise in the docs (since
the usage is complicated enough as it is), but I think
it may help folks who are used to the CouchDB style
where we think of the Pouch options as being equivalent
to the Couch HTTP params.