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/lua_api/l_object.h

@@ -216,6 +216,9 @@ class ObjectRef : public ModApiBase {
 	// hud_set_flags(self, flags)
 	static int l_hud_set_flags(lua_State *L);
 
+	// hud_get_flags()
+	static int l_hud_get_flags(lua_State *L);
+
 	// hud_set_hotbar_itemcount(self, hotbar_itemcount)
 	static int l_hud_set_hotbar_itemcount(lua_State *L);