[Grace-core] Dialect encoding

[James Noble]

> I've read through all 5 messages, but I'm afraid that I don't understand how this encoding works.  Can you help me?

yes, Tim, that would be good...

> I agree it would be nice if we could encode dialect as something already in the language, but I won't feel terrible if we have to add it as a specialization of inheritance ("inherits public").

right - well I hope we can explain it in terms of our existing mechanisms -
even if, especially for novices, we need special syntax.

james