Add extra theme assets to the asset path
Add extra theme assets to the asset path

The new version of Sprockets for Rails 4.2 only adds assets from the
base path so we need to add this ourselves.

https://github.com/rails/sprockets-rails/blob/v3.2.0/lib/sprockets/railtie.rb#L84-L87

mysociety/sobanukirwa-theme,mysociety/sobanukirwa-theme