Add generated ability file
Create override score views and controller actions
Add roles to user model
Define abilities for admin, mod, user, and anonymous guests
Fix user role check methods
Fix cancan authorization for application. Move actions into Pages controller
Authorize all controllers, conditionally display edit, delete buttons
Remove broken controller tests due to cancan not liking Rails 4.

Also give users fixture a role
Merge pull request #36 from f3ndot/issue-34-implement-user-permissions

Implement user permissions and authorize. Fixes #34