Patches were submitted against the koans directory rather than the
src directory. This lead to potential problems when we regenerate the
koans directory from scratch, leading to the very real possibility
that changes could be lost.
Please make all changes to the src directory and use "rake gen" (or
"rake regen") to generate the koans directory as needed.
Evidently, a lot of changes / pull requests were made to the koans
directory and not to the src directory. Perhaps we should remove the
koans directory entirely from the repo.
