[Grace-core] Inheritance and object initialisation

[James Noble]

> I'm a little surprised that no one else has weighed in on Michael's questions and my responses.  I'm about to sit down and write down a sketch of the formal semantics of classes/objects if no one has any objections to my interpretation.  On the other hand, it's a fairly tedious task and I don't want to do it if anyone objects strongly to my interpretation.  What say you?

on my side, just that it's the first week of term here, so starting teaching
has taken precedence. I'm hoping to get to this this afternoon or evening.

James