Implement each region generation

defs/regions/roots/europe.txt

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+albania
+alps
+andorra
+austria
+azores
+belarus
+belgium
+bosnia-herzegovina
+britain-and-ireland
+bulgaria
+croatia
+cyprus
+czech-republic
+dach
+denmark
+estonia
+faroe-islands
+finland
+france
+georgia
+germany
+great-britain
+greece
+guernsey-jersey
+hungary
+iceland
+ireland-and-northern-ireland
+isle-of-man
+italy
+kosovo
+latvia
+liechtenstein
+lithuania
+luxembourg
+macedonia
+malta
+moldova
+monaco
+montenegro
+netherlands
+norway
+poland
+portugal
+romania
+serbia
+slovakia
+slovenia
+spain
+sweden
+switzerland
+turkey
+ukraine
+united-kingdom