added translation of the cost-message for the following languages: English, English upside down, English shakespeare, German, French, Dutch, Spanish, Danish, Finnish, Swedish, Italian, Polish, Turkish, Russian, Japanese
added "pling" sound if you have enough levels (and anvil shows "too expensive")
added bass-sound if you don't have enough levels (and the anvil shows "too expensive)
added unit-tests
no message will be sent if you're in creative mode
