Redirect to login page with a model "error" rather than a rails error page

[aaronlippold]

When you are currently not logged in and you git a page that requires you to be authenticated we are going to the standard rails error page.

We should update this to redirect to the login page with a red error notification saying that you need to log in to use this feature, section or whatnot.

[lukemalinowski]

Aaron, do you have exact pages still do this that should not? Only one I can think of is if you want people to be prompted to login if they directly go to an evaluation URL they are not allowed to access? It should be noted this will leak the evaluation id's existence as non-existent evaluations will return a 404 or 500.

[robthew]

I'll add in a exception catch into the application_controller.rb to handle any unauthorized page accesses. It will redirect to the root and flash an message