OG access byRole

Control access to OG content by OG role. Uses OG Role Reference Field (og_role_field) to choose the allowed roles for each node, so you can have select lists, checkboxes, radio buttons, etc. Leave the field blank to disable the feature, allowing other node access modules (like OG Content Visibility, og_access) to do their work.

Works well with og_access.

Currently alpha status. Project title can be rewritten to something more readable after promotion to full project.