Added preference for the used iTunes Store.

TagTunes/Preference Controllers.swift

@@ -42,6 +42,20 @@ internal class GeneralPreferencesViewController: NSViewController {
         }
     }
     
+    dynamic var iTunesStores: [String] {
+        return NSLocale.ISOCountryCodes().map { NSLocale.currentLocale().displayNameForKey(NSLocaleCountryCode, value: $0)! }
+    }
+    
+    dynamic var currentITunesStoreIndex: Int {
+        set {
+            let countryCode = NSLocale.ISOCountryCodes()[newValue]
+            Preferences.sharedPreferences.iTunesStore = countryCode
+        }
+        get {
+            return NSLocale.ISOCountryCodes().indexOf(Preferences.sharedPreferences.iTunesStore)!
+        }
+    }
+    
 }
 
 internal class TagsPreferencesViewController: NSViewController, NSTableViewDataSource, NSTableViewDelegate, NSMenuDelegate {