Added Position class to better use GeoUtility.

- mark now inherit from Position

#story[828]

src/main/java/seng302/server/simulator/mark/Position.java

@@ -0,0 +1,31 @@
+package seng302.server.simulator.mark;
+
+public class Position {
+
+	double lat, lng;
+
+	public Position(double lat, double lng) {
+		this.lat = lat;
+		this.lng = lng;
+	}
+
+	public String toString() {
+		return String.format("Position at lat:%f lng:%f.", lat, lng);
+	}
+
+	public double getLat() {
+		return lat;
+	}
+
+	public void setLat(double lat) {
+		this.lat = lat;
+	}
+
+	public double getLng() {
+		return lng;
+	}
+
+	public void setLng(double lng) {
+		this.lng = lng;
+	}
+}