2014-07-06:  Moved to GitHub.

2012-07-15:  Rewrote README in Markdown.

2012-05-31:  Fixed new OCaml 4.00 warnings.

2012-03-28:  Changed representation of streams to provably satisfy
             computational complexity guarantees.

             Thanks to Arthur Charguéraud <arthur@chargueraud.org> for
             pointing out this issue!

             Added Apache license Version 2.0.

2006-03-29:  Removed superfluous thunking of "empty" values in polymorphic

2006-03-29:  Removed superfluous thunking of "empty" values in polymorphic
             datastructures due to relaxed value restriction in new
             OCaml-releases.

2002-07-23:  Small beautification.

2001-06-05:  Made code more idiomatic.
             Implemented stubs in chapter 8.

1999-04-09:  Initial release.
