RBAC and Spaces

This is a pretty big update with a lot of changes, so I'll try to keep it as short as possible while I continue to work on new features.

Latest changes:

• Fixed the Changelog page not being viewable by logged out users (thanks Charlie)
• Fixed the link script paging the wrong endpoint (thanks Charlie (again))
• Added user roles and permissions
• Added the ability to create custom 404 pages for your space. Just place a 404.html in your root directory.
• Added the file router for user spaces
• Fixed a bunch of broken bits and weird syntax