Locations manifest, reorganized instances settings

Extensions/Sequence+Unique.swift

@@ -0,0 +1,8 @@
+import Foundation
+
+extension Sequence where Iterator.Element: Hashable {
+    func unique() -> [Iterator.Element] {
+        var seen: Set<Iterator.Element> = []
+        return filter { seen.insert($0).inserted }
+    }
+}