Add tasks for all the new languages

Task/Nth/Swift/nth.swift

@@ -0,0 +1,29 @@
+func addSuffix(n:Int) -> String {
+    if n % 100 / 10 == 1 {
+        return "th"
+    }
+
+    switch n % 10 {
+    case 1:
+        return "st"
+    case 2:
+        return "nd"
+    case 3:
+        return "rd"
+    default:
+        return "th"
+    }
+}
+
+for i in 0...25 {
+    print("\(i)\(addSuffix(i)) ")
+}
+println()
+for i in 250...265 {
+    print("\(i)\(addSuffix(i)) ")
+}
+println()
+for i in 1000...1025 {
+    print("\(i)\(addSuffix(i)) ")
+}
+println()