Fix heart + bubble bar size on different texture packs

Add DPI support for statbar
Move heart+bubble bar to Lua HUD
Add statbar size (based upon an idea by blue42u)
Add support for customizing breath and statbar

src/script/cpp_api/s_env.h

@@ -37,6 +37,9 @@ class ScriptApiEnv
 	// After initializing mapgens
 	void environment_OnMapgenInit(MapgenParams *mgparams);
 
+	//called on player event
+	void player_event(ServerActiveObject* player, std::string type);
+
 	void initializeEnvironment(ServerEnvironment *env);
 };