Add tasks for all the new languages

Task/Hailstone-sequence/Ceylon/hailstone-sequence.ceylon

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+shared void run() {
+	
+	{Integer*} hailstone(variable Integer n) {
+		variable [Integer*] stones = [n];
+		while(n != 1) {
+			n = if(n.even) then n / 2 else 3 * n + 1;
+			stones = stones.append([n]);
+		}
+		return stones;
+	}
+	
+	value hs27 = hailstone(27);
+	print("hailstone sequence for 27 is ``hs27.take(3)``...``hs27.skip(hs27.size - 3).take(3)`` with length ``hs27.size``");
+	
+	variable value longest = hailstone(1);
+	for(i in 2..100k - 1) {
+		value current = hailstone(i);
+		if(current.size > longest.size) {
+			longest = current;
+		}
+	}
+	print("the longest sequence under 100,000 starts with ``longest.first else "what?"`` and has length ``longest.size``");
+}