Reduce dependencies for anycache-async.

v0.7.3 2017-08-06

Depend on lru package from opam.

v0.7.0 2017-08-06

Port to jbuilder, fix build with newer alcotest.

Breaking changes

Separate packages opam and ocamlfind packages for anycache-lwt and anycache-async.

v0.6.0 2016-11-24

Extract caching code from LibreS3 into its own library.