Merge pull request #22 from lukemesiti/lukeDevel

Awesome it Works!
pundit event policy
- created event policy
- modified destroy method in event controller
pundit events
- modified events controller methods create/update/edit to require authorisation
- modified events index page to only show edit/destroy/new for those allowed to perform these functions
pundit policies
- modified all policies to check that a user is present before checking for a user role.