Add jshint freeze: true
Ensure we're using the latest version of cradle

and, rm mocha from the dependencies #oops
Start the changes feed at current time

…we don't need all the changes, just the ones after our current point.
Changes feed adds now use merge

…technically this shouldn't matter, but we'll use the merge option to 
ensure backbone doesn't ignore our add.
Changes feed updates don't need to read the db

We were reading from the db every time the changes feed detected a
change in an effort to ensure we had the latest _rev number. Turns out
to be unnecessary. The real problem was the faulty cradle cache.
Add debug logging for the changes feed