Added Vector.toVector2D and Vector2D.toVector.

src/main/java/com/sk89q/worldedit/Vector.java

@@ -619,6 +619,15 @@ public class Vector {
         return new BlockVector(this);
     }
 
+    /**
+     * Creates a 2D vector by dropping the Y component from this vector.
+     *
+     * @return Vector2D
+     */
+    public Vector2D toVector2D() {
+        return new Vector2D(x, z);
+    }
+
     /**
      * Gets the dot product of this and another vector.
      *