2.2.0

• FEATURE: Update translations
• FEATURE: Golang API bindings and cmdline tool
• FIX: Add validation of high scores
• FIX: Add support for updated attributes to API
• FIX: User delivery server API was not working
• FIX: Ensure port is included in auth settings json
• FIX: Exception in auth protocols dict lookup
• FIX: Domain smarthost API was not working
• FIX: Organization smarthost API was not working
• FIX: Fallback server API was not working
• FIX: Send correct HELO when testing delivery servers
• FIX: Update search index on record update
• FIX: Ensure outbound restriction list is updated on domain changes
• FIX: Made exception in two factor authentication more user friendly