Update all exhibits to use yoob.js 0.6.
Update exhibit for Progression interface change.
Begin removing commentary.
Remove more commentary.
Remove more commentary.
Even less commentary.
Remove more commentary, mostly from game nodes.
Remove the last of the commentary.
Allow overlaying data from an external YAML file.
A refactoring journey on a road paved with good intentions begins with a single step, or something.
More stuff.  Classes with fancy names.
Move fast, break stuff, etc.
Fix jsonify and announce commands.