do we want to factor more common bits out of the core mop classes?

[doy]

This is slightly related to #95. There are a lot more things that metaclasses have in common than just the fire/bind stuff - class, role, attribute, and method all have name, class and role have version and authority, attribute and method have original_id and associated_meta, etc. It seems like a lot of this could be factored out into roles, to remove a lot of duplication.

[stevan]

Yes, this makes sense, however we need to be careful about how much work we are adding to the bootstrap, it could cause performance issues.