refractoring

src/main/java/core/Master.java

@@ -1,10 +1,10 @@
 package core;
 
+import core.math.Vector2D;
 import objects.DebugPos;
 import objects.ships.BattleShip;
 import objects.GameObject;
 import objects.ships.Submarine;
-import objects.ships.Turret;
 import objects.world.Grid;
 import objects.world.Wall;
 

src/main/java/core/math/ExMath.java

@@ -1,4 +1,4 @@
-package core;
+package core.math;
 
 /**
  * Extended Math functions for the game engine

src/main/java/core/math/Vector2D.java

@@ -1,4 +1,4 @@
-package core;
+package core.math;
 
 
 /**