Correct easy_thumbnails.VERSION check

Don't compare a tuple to an int
Update demo project requirements

Use Django 1.4 for LTS, Mezzanine 3.1.2 for pages context
processors, required django-filer version from Widgy, and
django-debug-toolbar 1.0.0 for new panel locations
Add Page Order to demo.settings
Update recommend ADMIN_MENU_ORDER to clarify django-filer
Make Widgy's jQuery private

Widgy's jQuery was overwriting window.jQuery and window.$. This uses the
recommendation from http://requirejs.org/docs/jquery.html#noconflictmap
to prevent this.

This prevents bugs where other people loading jQuery on the page add
plugins to it, and then Widgy's jQuery (without any plugins) overwrites
theirs.