Refactored the setup for MarkObjects (now renamed Markers) and made the CompoundMark + Mark + GeoPoint classes the standard across all classes instead of GateMark + SingleMark + Mark.

#refactor

src/main/java/seng302/model/GeoPoint.java

@@ -0,0 +1,31 @@
+package seng302.model;
+
+/**
+ * A class represent Geo location (latitude, lnggitude).
+ * Created by Haoming on 15/5/2017
+ */
+public class GeoPoint {
+
+	private double lat, lng;
+
+	public GeoPoint(double lat, double lng) {
+		this.lat = lat;
+		this.lng = 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;
+	}
+}