Add method to get Device ID to Can Jaguar (fixes artf3613)

Change-Id: I7b0cb555a56ee97cf90ea32a3080b7c14bb5ca56

wpilibc/wpilibC++Devices/include/CANJaguar.h

@@ -143,6 +143,7 @@ public:
 	bool IsSafetyEnabled();
 	void SetSafetyEnabled(bool enabled);
 	void GetDescription(char *desc);
+	uint8_t GetDeviceID();
 
 protected:
 	// Control mode helpers

wpilibc/wpilibC++Devices/src/CANJaguar.cpp

@@ -2036,6 +2036,11 @@ void CANJaguar::GetDescription(char *desc)
 	sprintf(desc, "CANJaguar ID %d", m_deviceNumber);
 }
 
+uint8_t CANJaguar::GetDeviceID()
+{
+	return m_deviceNumber;
+}
+
 /**
  * Common interface for stopping the motor
  * Part of the MotorSafety interface

wpilibj/wpilibJavaDevices/src/main/java/edu/wpi/first/wpilibj/CANJaguar.java

@@ -2103,6 +2103,10 @@ public class CANJaguar implements MotorSafety, PIDOutput, SpeedController, LiveW
 	public String getDescription() {
 		return "CANJaguar ID "+m_deviceNumber;
 	}
+	
+	public int getDeviceID() {
+		return (int)m_deviceNumber;
+	}
 
 	/**
 	* Common interface for stopping a motor.