- removed empty constructors in updated endpoints - added missing keys to Error class (unauthorized, forbidden)
- re-added Setting::getAll() to API/Setting::set() in response - updated settings/setup tests
- converted Setup endpoint - unit tests for Setup endpoint
- (re)Added Endpoints folder to both API and Router - fixed syntax in namespaces - xhr.responseJSON is returned to the fail() - fixed Router endpoints (view in browser, cron,...)