RSS for topics in a category
Creates a new route for category RSS
introduce Enum
Remove unusued site_settings, show checkbox in UI for boolean values, remove restrict_access
boolean to avoid locking yourself out by setting access_password to empty string. Minor
UI tweaks.
Merge pull request #309 from goshakkk/enums

Introduce Enum
Fixes broken "From" header in Private Message emails.
Merge pull request #290 from alxndr/category-rss

RSS for topics in a category
Fix jshint issue with `[^]` in regexp.
Send forum title and hostname along with version check
Add specs for Enum class
Update SiteSettingExtension to use new Enum class
Removed unused `type` parameter in site settings. Remove hardcoded date reference in en.yml
Missed reference to `type`