Added a method to teleport entities across worlds.

worldedit-core/src/main/java/com/sk89q/worldedit/entity/Entity.java

@@ -54,6 +54,14 @@ public interface Entity extends Faceted {
      */
     Location getLocation();
 
+    /**
+     * Sets the location of this entity.
+     *
+     * @param location the new location of the entity
+     * @return if the teleport worked
+     */
+    boolean setLocation(Location location);
+
     /**
      * Get the extent that this entity is on.
      *