Re-added callback (only in signature) for suicide().
On branch unstable
Changes to be committed:
modified:   lib/herod.js
modified:   test/mixed-test.js
Added version 0.4.1.
added main process killback/callback for suicide method.
On branch unstable
Changes to be committed:
modified:   Readme.md
modified:   lib/herod.js
modified:   package.json
renamed:    test/mixed-test.js -> test/mixed-run-test.js