added PID file validation and validation for process name scoped by group
added PID file validation and validation for process name scoped by group

sferik/bluepill,bluepill-rb/bluepill,sferik/bluepill,fgbreel/bluepill,fgbreel/bluepill,dealpath/bluepill,bluepill-rb/bluepill,iroller/bluepill,d-unseductable/bluepill,iroller/bluepill,dealpath/bluepill,d-unseductable/bluepill