Clean up UI, work on tutorial

src/Location.h

@@ -106,6 +106,8 @@ namespace ZL
 		// Used by the tutorial system to detect the "tap to walk" gesture.
 		std::function<void()> onPlayerFloorWalk;
 
+		std::function<void()> onPlayerTaxiRequired;
+
 		// Set by Game after setup(). Lua and onDeathAnimComplete call this to
 		// request the transition without coupling Location to Game directly.
 		std::function<bool()> requestDarklandsTransition;