Issue 1597 interaction data

close #1592

Issue1592

fix bug preventing proper handling of old style verification links by new style code, documented exhaustively in issue #1592.

zero-change cosmetic cleanup of code.  make exit points explicit, and use curly braces consistently.

* Removed the .interactionData namespace from storage.js, created our first model - shared/models/interaction_data.js
* Simplified how data is stored into interaction_data, created current and staged sub-namespaces
* Added stageCurrent and publishStaged functions.
* in shared/modules/interaction_data.js, simplified calls to model.
* Tried to make the xhr mock make more sense and provide facilities usable for peeking at last XHR request data.

issue #1597

Fix loadgen

removed extraneous ca.verifyBundle and ca.verifyChain

issue #1592 update complete_email_addition to accept a password in the case that email verification was started on a previous version of the software that didn't collect a password in-dialog

issue #1592 - update complete_user_creation to accept a password in the case that email verification was started on a previous version of code.

Make users who have not yet set their password by time they reach the landing page set their password.

issue #1592

cleanup transitional code for migration from email to userid in stage table

r+ - nice cleanup @lloyd!  Tests run, verified by creating new users and adding users to existing account.

close #1599

Adding timestamp server side to get an intial integration going.

when the server returns a 413 error for posting of interaction data, cle...

Fix for Chrome shifting the "Sign In" button in the email picker when clicking.

when the server returns a 413 error for posting of interaction data, clear the data from local storage - issue #1567

issue #1581

insert a setTimeout between two main phases of assertion generation

closes #1575

insert a setTimeout between two main phases of assertion generation to prevent unresponsive script warnings in IE8 - issue #1575

Partial fix IE6 and IE7 blowing up on main site.  These browsers do not have Array.prototype.indexOf

can now set MYSQL_PASSWORD in env

* css/style.css - where relevant and opacity's are used, use filters for IE6 and IE7.
* shared/storage.js - when clearing localStorage if the user is not authenticated, call removeItem for the emails.  The call to JSON.stringify was blowing up.

issue #1529