[bug #1005001] Move email validation to utils module
Add test harness for js utility functions

This adds a test harness for js utility functions. You can test them
manually by going to:

    http://localhost:8000/static/tests/

This should get hooked up to the test suite.
[bug #1005001] Add + in email addresses
Add docs for QUnit tests
[bug 964292] Add statsd call for old android stuff

We have some code that allows backwards-comaptibility with the way
Firefox for Android used to post feedback. This allows us to measure how
often that's being used so we know when to pull it out.
[bug 994224] Fix the datestamp on the response details page
Update docs re: CACHES
[bug 994626] Update hacking howto

This folds the Elasticsearch section in making it a requirement for
Input. This also moves some things around and makes "running the server"
and "running the tests" important parts of the hacking howto.