After long preparations (lasting for several years) we finally launched brand new version of this site. Hopefully the main purpose has been achieved: more comfort and more information. We will go on improving and expanding the functionality. Those who liked the old verson more, still can access it from the menu on the left bottom. However, it will not be maintained any more. Enjoy browsing, and feel free to write us your opinion. You can find the contact in the left-hand menu (About Us).