Views refactoring

• Reimplement all views as class-based views
• Move all detail views to GET methods
• Simpler permission lookups, users have all lower tiers of clearance then own
• Rename any templates that have a folder named same as them to folder/index.html
• Merge render() function into Context for easier usage, store request in context
• Page number and length inside add_pagination_context
• Walk through all redirects and add a call to reverse to look up the correct path