[plt-scheme] new programming languages book

Hi,

I've just Web-published the first complete version of my programming
languages text:

  http://www.cs.brown.edu/~sk/Publications/Books/ProgLangs/

This is the text for my course at Brown, which I supplement with some
material that I discuss in the Preface.  The course uses Scheme and is
interpreter-based, but diverges considerably from EoPL in both style
and coverage.  In particular, it is part of my continuing attempt to
find a happy medium between the interpreter and survey-of-languages
schools of teaching programming languages.

Cheers,
Shriram