2018-03-09: Better expression requisites
2018-03-05: Chains of preferred dependencies
2018-03-03: Native packages per distro with autodetection of availability
2018-02-29: Conditional properties and their materialization
2018-02-28: Declaration of scenario variables, native packages a-la OPAM
2018-02-26: query policies, search by property
2018-02-25: licenses as properties
2018-02-22: alr test command
2018-02-20: get --info
2018-02-20: Named properties (Labels); e.g.: Maintainer, Website
2018-02-18: Recovery from backup executable if compilation interrupted
2018-02-14: Properties with arbitrary logical expressions
2018-02-11: Native packages as valid dependencies
2018-02-08: Captured output of spawned commands
