Thanks for the wide variety of comments and suggestions.

At the clever suggestion from Brent London, I’ve created (I hope) a Google Docs version of a recent revision.

There have been some material changes from that originally distributed, so if you were Ok with the original, you may want to check this one out.

And I hope I have made it possible for people to make comments.   Please let me know if you’re not able to do so.

Thanks.

Don