Add new authentication related KPIs for @nmalkin

close #1825

Minimalist implementation of support in core for Proxy IDP (a.k.a. "BigTent")

Fix cookie check cookie made into a session cookie in IE8

log reason for bad verifier assertion and increment statsd failure counter

add test coverage of origins that start with digits, and relax validation regex a bit - closes #2042

Cachify the logo as well.

issue #1999

i18n fixes

new regex for matching origins - issue #1981

extensive testing of i18n mechanism - including english fallback, string substition from .json files, and debug locale

new KPIs in the event stream:
* authenticate.enter_password
* authenticate.password_submitted
* authenticate.password_success
* authenticate.password_fail

Added a couple of new testHelper functions, expectedMessage and unexpectedMessage

More verbose instructions for the initial MySQL setup

Fix the slow Fennec key press response in the email field.

* Only show a hint if it is not already shown.

close #2007

Never set a future expiration date, to delete the cookie set an expiration date of yesterday.

they are no longer separate timeouts, nor do they start at
slightly different spots in the code.

The countdown starts at the end, and only once the countdown
reaches 0, does the redirect take place.

fixes #2007

this makes sure callbacks for animations truly are called only
after the animation has finished. before, it'd be possible to trigger slightly ahead because of setTimeout tomfoolery

Fix exception being thrown if KPI data is disabled.

remove helpers.extend

Update the cookies disabled copy