Detailed description: 
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- An application provides official exchange rates published by the Czech National Bank (Central bank) 
- The user gets the exchange rates based on the selected date or for today.
- Add-on creates a new Sheet with all currencies - called "kurzy CNB"
- Exchange rates: CZK (Czech KrounKoruna) to 33 foreign countries
- Including the Economic and Monetary Union of the European Union (EMU) and The International Monetary Fund (IMF)  
- Supported currencies & rates for countries:  Australia, Brazil, Bulgaria, Canada, China, Croatia, Denmark, EMU, Hongkong, Hungary, Iceland, IMF, India, Indonesia, Israel, Japan, Malaysia, Mexico, New Zealand, Norway, Philippines, Poland, Romania, Russia, Singapore, South Africa, South Korea, Sweden, Switzerland, Thailand, Turkey, United Kingdom, USA

Add-on functionality:
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- Add on creates a new sheet "kurzy CNB" (if it does not exist).
- In Add-On Menu is CNB with three sub-menus
1) Kurz pro vybraný den =  Exchange Rates for the selected date 
2) Dnešní kurz = Today Exchange Rates
3) Nápověda = Help