Keila v0.15.1

Version 0.15.1

Added

• Button for creating new users as admin (thanks @pmareke and @hellehata)
• Contacts can now re-subscribe or update their data by submitting a form again
  (thanks @Lislegaard for suggesting)
• Honeypot fields to block bot subscriptions

Changed

• Limited first_name and last_name fields to 50 characters.
  Implements #342 (thanks @Lislegaard for suggesting)

Fixed

• Updated broken tzdata library. Fixes #336. (thanks @VincentSC for reporting)
• Deletion of shared senders from the UI is now working.
  Fixes #326 (thanks @bpivk for reporting)