Refactor to dispense with the quest_coderunner_types DB table and instead use prototype-based inheritance from existing questions. This is the first step towards user-written question types.
Lots of refinements and bugfixes for the new DB model without an explicit question-types table.
Incorporate use of Ace code editor (thanks to Ulrich Dangel).
Minor changes to loadtesting to better support testing of languages separately.
Fix template-grading test to handle new question structure.
Switch to use of the standard Moodle administrator plug-in settings for selecting which sandboxes to use and for configuring the Ideone sandbox.
Fix bug in setting of max output file size for runguard sandbox (was 1000x too big; bytes not kilobytes).
Further steps towards user-defined types (still incomplete).
Ongoing user-defined question type development.
More changes to support user-defined types, which are now working in alpha state, with global scope.
FInalise implementation of penalty_regime capability.
Version 2.0 alpha release. Includes new prototype-based question types and user-defined types (though global, not scoped). No documentation yet. Coming soon to a PC near you.
Trying to fix DB screw up in move to V2.0 because of screwed up version numbers. Watch this space.
Hopefully the last in this series of panics while I try to kick our main server back in to life :)

[Apologies to anyone else who's trying to track the Development version.]
Nope, still going on the fix-ups to our production server.
OK, Version 2.0 alpha is now working on our production server.
Fix bug with use_ace flag.
Fix corrupted upgrade.php
Various minor bug fixes and documentation upgrades.
Addition of behaviourtype.php to commit.