add a basic Player class

src/common/Player.cc

@@ -0,0 +1,9 @@
+
+#include "Player.h"
+
+Player::Player()
+{
+    x = 0.0;
+    y = 0.0;
+    direction = 0.0;
+}

src/common/Player.h

@@ -0,0 +1,18 @@
+
+#ifndef PLAYER_H
+#define PLAYER_H
+
+#include <string>
+
+class Player
+{
+    public:
+        std::string name;
+        double x;
+        double y;
+        double direction; /* 0 = East, M_PI_2 = North, M_PI = West, ... */
+
+        Player();
+};
+
+#endif