Various examples and tests on how child processes can (or cannot) be terminated on Linux, OS X and Windows.
5682006 - Added a minimal example for sigterm and found a solution on how to send sigbreak into processes.
79cefe5 - Added tests for sigint, sigterm and sigkill for linux.
f2381c9 - Added hgignore.
c9d9488 - Initial commit and Ctrl-C example.