Untar

The original archive from Kenichi Asai is fully functional (modulo the changes in the Scheme standard for streams, already fixed). So let's just untar the whole archive, as it has extra goodies. I just did the following steps from within the `black` directory:

* `wget http://pllab.is.ocha.ac.jp/~asai/papers/black.tar.gz`
* `tar -xzvf black.tar.gz`
* `rm black.tar.gz`
* `git add .`
* `git commit`

I'll send you a pull request later for the code examples from my Strange Loop talk, in a separate directory.