Add travis CI support.
Merge pull request #1 from d2rk/travis-ci

Add travis CI support.
Provide the support to restart processes. Implement restartProcess and restartProcessGroup methods. Implement sendSignal method that allows to send signals to the process. Thus we can send HUP signal to the daemon process in order to restart them.
Add the test for Process.sendSignal method.
Allow process manipulator to restart processes.