Nutupane - Moving bulk action templates under app/assets/views.

The bulk action templates were living under public/ but Rails cached
these even in development mode. By moving them under app/assets/ the
templates will be reloaded and can still be loaded under public in
production.
Nutupane - Re-factoring and clean-up, addition of SystemGroup loading.

This re-factors the Nutupane factory to be a re-usable object factory.
The change requires each object using the Nutupane factory to instantiate
an instance of it through `new Nutupane()`.

The current_organization value was re-factored to follow naming
conventions and is now CurrentOrganization.

Includes addition of SystemGroup search functionality in API layer.
Merge pull request #2377 from ehelms/nutupane-bulk-actions

Nutupane bulk actions