Add tasks for all the new languages

Task/Guess-the-number/Swift/guess-the-number.swift

@@ -0,0 +1,17 @@
+import Cocoa
+
+var found = false
+let randomNum = Int(arc4random_uniform(10) + 1)
+
+println("Guess a number between 1 and 10\n")
+while (!found) {
+    var fh = NSFileHandle.fileHandleWithStandardInput()
+
+    println("Enter a number: ")
+    let data = fh.availableData
+    var str = NSString(data: data, encoding: NSUTF8StringEncoding)
+    if (str?.integerValue == randomNum) {
+        found = true
+        println("Well guessed!")
+    }
+}