Added a class for the marker, and added documentation

- Added documentation for the Race class
- Added a class for the Marker instead of just storing the name of the marker in a string

Tags: #docs #implement #story[4]

src/main/java/seng302/Marker.java

@@ -0,0 +1,17 @@
+package seng302;
+
+class Marker{
+	private String name;
+
+	public Marker(String name){
+		this.name = name;
+	}
+
+	public void setName(String name){
+		this.name = name;
+	}
+
+	public String getName(){
+		return this.name;
+	}
+}