1.8.0

• Upgraded to Cliquet 2.10.0

Protocol breaking changes

• Moved userid attribute to a dedicated user mapping in the hello
  view (#242).

New features

• Follow redirections in batch subrequests (fixes mozilla-services/cliquet#511)
• Set cache headers only when anonymous (fixes mozilla-services/cliquet#449)
• Add a readonly setting to run the service in read-only mode. (#241)
• If no client cache is set, add Cache-Control: no-cache by default,
  so that clients are forced to revalidate their cache against the server
  (ref #231)

Bug fixes

• Fixed 503 error message to mention backend errors in addition to unavailability.
• When recreating a record that was previously deleted, status code is now 201
  (ref mozilla-services/cliquet#530).
• Fix PostgreSQL error when deleting an empty collection in a protected
  resource (fixes mozilla-services/cliquet#528)
• Fix PUT not using create() method in storage backend when tombstone exists
  (fixes mozilla-services/cliquet#530)
• Delete tombstone when record is re-created (fixes mozilla-services/cliquet#518)
• Fix crash with empty body for PATCH (fixes mozilla-services/cliquet#477, fixes mozilla-services/cliquet#516)
• Fix english typo in 404 error message (fixes mozilla-services/cliquet#527)