certify 6.x-2.0-alpha2

API update. Condition modules need to signal changes in the condition data by either calling certify_nodechanged ($nid) with the nodeid of the condition that changed or $cert->scoreChanged() on all affected certificates.

Also added a warning to the status page if no conditions are enabled. This one bit me for half a workday. :-/

If anyone is working on condition modules, please let me know. I'd like to hear if the API works out for you. :)