What constitutes a violent crime? That’s the question at the root of this report from the Examiner’s Scott McCabe, which notes that an FBI report released on Monday shows that violent crime in the District actually increased by 2.3 percent in 2008, despite D.C. Police Chief Cathy Lanier’s triumphant announcement earlier this year that it had dropped by 5 percent. The FBI and the MPD use different measurements, you see, when it comes to counting…