Merge pull request kodecocodes#508 from bobdel/swift4

Updated for Swift 4 Xcode 9b4

Author: kelvinlauKL

Fizz Buzz/FizzBuzz.playground/Contents.swift

@@ -1,3 +1,8 @@
+// last checked with Xcode 9.0b4
+#if swift(>=4.0)
+print("Hello, Swift 4!")
+#endif
+
 func fizzBuzz(_ numberOfTurns: Int) {
   for i in 1...numberOfTurns {
     var result = ""