I'm going to start using release numbers again. The release number will cover all changes to arclib-core and its extensions, and after every release I will create a new branch of ArcLib. I'm going to update the track ticket system for the current release and future release. I'll let track be my change log.
Arc (0.3) will have massive changes compared to Arc 0.2. Completely new physics system (done), scenegraph simplification (done), new GUI system (working progress), completely re-factored arclib code layout (done), as more as seen in the above log.