Switch over to use Laravel's built-in controller layouts

We were trying to reinvent the wheel when it wasn't necessary. This also
addresses errors that were thrown about sending after headers had already
been sent (which, of course, was fixed in the L4 core as I was working on
this). Hopefully this is a much cleaner way of handling the controller
work now.
Fix broken login persistence
Test routes
Make sure the persistent login cookie is right. Fixes #43
Add access role validator
Access role management work
Update the base controllers
Do some Blade conversions
Fix the structure files to use controller layouts
Remove the debug call for Sentry::check
Add the access task event handler
Update the seed data
Update the global stylesheet
Work on duplicating roles
Add the access role event handler
Fix the handler aliases
Fix a few issues in the access models
Access role management work
Merge branch 'master' of github.com:anodyne/nova3