Some clean up, web version prepare

src/TeleportZone.h

@@ -4,7 +4,7 @@
 #include <Eigen/Core>
 #include "SparkEmitter.h"
 
-namespace ZL {
+namespace FRG {
 class Renderer;
 class Texture;
 
@@ -33,4 +33,4 @@ struct TeleportZone {
     void draw(Renderer& renderer, float zoom, int width, int height);
 };
 
-} // namespace ZL
+} // namespace FRG