This looks great and cleans up the global namespace... awesome r+

* This makes it available before any gettext calls are done in wait-messages and error-messages.
* Create's only a single instance that is used universally.

close #925

gettextifying the following templates:

* add_email
* confirm_email
* invalid_required_email
* offline
* required_email
* testBodyTemplate
* verify_primary_user

Updating the renderer test to use a template that uses gettext.  Update the renderer to handle when vars are not sent to render.

Bugzilla bug #706572

Adding the shell of a cookie check.  Cleaning up network.js, changing network.js's callbacks to be simpler.

* Adding complete to helpers.js, which required a reordering of scripts.
* Using complete in network.js so that existence of callbacks is checked automatically.
* Add a cookie_check.js module which checks which shows an error message if the user's cookies are disabled.
* Get rid of yesterday's code which triggered an event if cookies were disabled.

issue #835.

* Makes for easier debugging and testing.

Conflicts:
	resources/views/index.ejs

Adding i18n client.json and gettext.js to layout.ejs. Fixes Issues#916. Touching index.ejs to clear cache

close #918

* Update code_check to take the file_name_prefix (dialog vs production)
* Update start.js main site and dialog to use code_check with correct file_name_prefix.
* Introduce the moduleManager to the main site to take care of creating/loading  modules.
* Change the order of the hiding/displaying of elements so there is no flash while the code version is being checked.

close #917

* Update network to allow for undefined code_version
* Update unit tests.
* Move code_check to static/shared/modules/
* Update build script for new location.

issue #226

* Add new delay screen.
* Add new tests to check for delay screen.
* Simplify display logic of the error message.

close #915

* The xhr_delay module would take away the wait screen as soon as any XHR message was complete, even if no xhr requests were delayed.

close #913

strargs is now 'format'.

For string interpolation, use %s instead of %1. %(name)s is also supported.

Bug706572 localization v2 r=benadida,stomlinson,lloyd