0.35.0.0

Highlighted Features

• This release rolls out Alaveteli Pro Pricing - a way to ask users to support
  your site by paying for access to the advanced Alaveteli Pro features
  (Liz Conlan, Gareth Rees, Graeme Porteous)
• Switch to using the new MaxMind DB data format for geoip lookups. Adds a rake
  task to download the geoip data file (Liz Conlan)
• Add new rake task to create the Stripe webhook endpoint (Liz Conlan)
• Send weekly metrics email to the Pro Admin team (Liz Conlan, Gareth Rees)
• Improve error handling when sending request-related emails (initial request
  mails and followups) - failed messages are captured and a send_error event is
  logged to make it easier for site admins to see what's happened (Nigel Jones)
• Fixed bug where expiring embargoes were not fully removed from batches when
  the related requests reached the publication data (Liz Conlan)
• Send daily webhook digest to the Pro Admin team (Graeme Porteous)
• Improved admin user search feature to also search the users' about me profile
  text (Graeme Porteous)
• Removed support for Ubuntu 16.04 LTS (Xenial Xerus) (Liz Conlan)
• Add support for Ruby 2.6 (Liz Conlan)