v0.17.1

• Change Deferred.t to Lwt.t in readme (#91, @rymdhund)
• Remove cow from deps (#92, @anuragsoni)

v0.17.0

• Switch to dune (#88, @anuragsoni)
• Keep the "/" cookie default and expose all cookie directives (#82, @actionshrimp)
• Do not assume base 64 encoding of cookies (#74, @malthe)
• Add caching capabilities to middleware (#76, @mattjbray)