Distribution checklist:

* DON'T FORGET: change install.rb when new src/ files are added
* Update the changelog
* Update the README
* Change any INSTALL instructions
* Update the manuals and HTML
* Modify what should not appear in the release (bin/prune.rb)
* Run makedist.rb and check the integrity of the resulting tarballs
  - Test installs
  - Run the unit tests (cd tests; ruby runtest.rb)
  - Run all the examples
  - Browse the docs
