1.0.0.9000

Rewrite the internals, to use system() instead of pipe(). pipe() was easier to use, but when the R session is closed there is no way to invoke a finalizer to kill the subprocesses, and the R session just hangs, waiting for the pipe() to close.

In this new version we avoid these problems by using system() instead of pipe().

1.0.0

First public release.