This makes a small improvement to 'cold cache' ember-cli build times, and a large improvement to 'warm cache' build times
The ember-auto-import update means that vendor is now split into multiple files for efficiency. These are named `chunk.*`, and should be included immediately after the `vendor.js` file. This commit also updates the rails app to render script tags for these chunks
In Ember CLI, the vendor bundler includes Ember/jQuery, so this brings
our app closer to that configuration.
We have a couple pages (Reset Password / Confirm New Email) where we need
`ember_jquery` without vendor so the file still exists for those cases.
While *sometimes* `no_js` was used for visitors without js (for example
disabling it on your browser) it was also used for some pages that were
disabled to JS capable browsers, including the 404 page.
Even worse, sometimes it was used on pages that *had* Javascript, such
as our `/activate-account` route. It has been renamed to `no_ember` to
indicate what it really is, a layout for the site that doesn't load our
Ember.js application.
