preliminary Rails 4 support

* bumps jQuery up to 1.10 via jquery-rails 3.0 and jquery-ui-rails 4.0
* tests against not-yet-released versions of dependent gems (formtastic, inherited_reosurces, etc.)
* removes protected attributes when running on Rails 4
* updates use of `ActiveModel::Name`
* fixes duplicate root route error when run from the root namespace
* includes the appropriate Sass helper depending on Rails version
* update asset pipeline check

Does NOT yet include support for strong parameters (which is the cause of the current Cucumber failures)