GAVRILO PRINCIP is famous for Gavrila Princip Street in Belgrade, home to my favourite restaurant Zavičaj's, where I have enjoyed three times now the best craft sausage, roast potatoes, cabbage salad, mustard and a memorable house red. GAVRILO PRINCIP is also famous for assassinating, in Sarajevo Bosnia, the Archduke Franz Ferdinand, heir to the Austro-Hungarian Empire, and starting World War One. "Assassinate" is too strong a word. I believe he was provoked. The under