- merged [PR #96](https://github.com/n1k0/casperjs/pull/96): make python launcher use `os.execvp()` instead of `subprocess.Popen()` ([@jart](https://github.com/jart)):
> This patch fixes a bug where casperjs' python launcher process won't pass along kill
> signals to the phantomjs subprocess. This patch works by using an exec system call
> which causes the phantomjs subprocess to completely replace the casperjs parent
> process (while maintaining the same pid). This patch also has the added benefit of
> saving 10 megs or so of memory because the python process is discarded.
