tl;dr thread. What about release circle as debian project have.
Stable (LTS) release, for example, each year or each 3 versions with backports available.
Testing release, for example, each month. Unstable (head revision), each week? Naming: dmd-2.065.0-2013.11.15-unstable.zip, dmd-2.065.0-2013.11.11-testing.zip, dmd-2.065.2.zip stable release with 2 update. dmd-unstable.zip - latest head rev build. dmd-testing.zip - latest testing/feature build. dmd-stable.zip - latest stable / LTS.