Update to Django 1.4.

Main changes:

* Change project layout, with (new version of) manage.py at the top, and
  and new eus_pipeline folder for urls, settings, etc
* Update the admin static files
* Change some imports
Update to Django 1.5.

* Update uses of {% url xxx %} to {% url 'xxx' %}
* Update admin static files
* Update admin index.html that we override
Update django-tinymce.

New release fixes some deprecation warnings.
Change deprecated import.
Fix deprecated method call.
Update django-form-utils, fix CSS
Reorganize settings to be more like Django 1.6.
Simplify blurb form JS.

(Start using Knockout.)
Rewrite pipeline generator using knockout.js.
Add media to .gitignore