[WFLY-1629] LSB init script for Debian based distros

Pull request for issue WFLY-1629, it's a single init script with a config file that can activate both modes standalone and domain mode...

Tested against Ubuntu 12.04 but should work with Ubuntu 10.04 and up (or even earlier versions), it should work on Debian 6 and 7... I could do some testing in Debian 7 this week if needed but I'm pretty sure that will work just like in Ubuntu 12.04.