PagerDuty implementation

[obazoud]

The project 'neustar' seems to be dead (last commit: Nov 22, 2011).
We are waiting that they merge Token API: webmetrics/pagerduty-java#2 /cc @mzsanford
And issues are open on our sides: #216 #209

Next steps:

• remove neustar dependency
• add pagerduty-incidents
• change PagerDutyNotificationService implementation

Any thoughts?

[obazoud]

See 350b05a