Added test classes for the networking and made so that the network engine sends object insted of raw data

src/ei/engine/network/message/StringMessage.java

@@ -0,0 +1,23 @@
+package ei.engine.network.message;
+
+public class StringMessage extends Message {
+	private static final long serialVersionUID = 1L;
+	
+	private String msg;
+	
+	public StringMessage(String msg){
+		this.msg = msg;
+	}
+	
+	public String getString(){
+		return msg;
+	}
+	
+	public void setString(String msg){
+		this.msg = msg;
+	}
+	
+	public String toString(){
+		return getString();
+	}
+}