* Disable the email field.
* Focus the first password field instead of the email field.
* If no email is stored (user did not come from /signin or /signup), redirect the user to /signin.
* If email address that is stored is not known, redirect to /signup.
* If email address that is stored is known but a primary, redirect to /signin
* When calling User.addressInfo on a primary address, check whether the address is known or not.  Allows us to simplify the forgot page.

* Remove the 250ms animation time.
* Update/fix unit tests.

* Slide the password fields down whenever they are shown.
* Add slideUp/slideDown, fadeIn/fadeOut to dom-jquery.js

* Remove the signup page and all remnants of it.

* If the user types in a known secondary, redirect the user to the signin page.
* If the user manually clicks the "new to persona?" or "Existing account?" links, clear the stored email address.

* If the user enters an unknown secondary email, redirect them to the /signup page.
* If the user arrives with a known secondary email in storage, show the password field.

* to page_helpers.emailSent, add a new input paramter - pollFuncName.  The poll functions are unique for each type of email sent.

* Generalize and cleanup unit tests

adorn confirmations on main site (like 'd00d, sure you wanna cancel') with gettext() for proper extraction and substition

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

Update user.createSecondaryUser to use stageAddressVerification.  rename stageAddressVerification to handleStageAddressVerificationResponse.

rename the 'add email' email we send out to 'confirm', and use it in both the email addition case, and the email reverification case.  This is more about semantics than behavior change

Generalize error-display to extended-info.  For every "screen" that is shown, create an extendedInfo and instantiate it.  Remove the "error-display.show" code that was in page_helpers and page_module.

issue #1916

issue #1967

remove the padding on the button in mobile mode so the button does not look super short

issue #1885

issue #1964

fixes #1885

Update network.js for password_reset_status

cleanup user.js for for better cohesion.

Add the "verified" bit to emails.
Start shells for the reset_password and confirm pages.

issue #1895

common/
      js
      css
      i

dialog/
      js
      css
      i

pages/
      js
      css
      i

re-enabled after request finishes

fixes #1661

* Make the about code use a PageModule.
* Include the about module in the static_resources instead of including it separately.
* Start the about module when looking at the about page.
* Add ultra basic unit test for about page.