Add tasks for all the new languages

Task/First-class-functions/Ceylon/first-class-functions-1.ceylon

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+module rosetta "1.0.0" {
+	import ceylon.numeric "1.2.1";
+}

Task/First-class-functions/Ceylon/first-class-functions-2.ceylon

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+import ceylon.numeric.float {
+
+	sin, exp, asin, log
+}
+
+shared void run() {
+	
+	function cube(Float x) => x ^ 3;
+	function cubeRoot(Float x) => x ^ (1.0 / 3.0);
+	
+	value functions = {sin, exp, cube};
+	value inverses = {asin, log, cubeRoot};
+	
+	for([func, inv] in zipPairs(functions, inverses)) {
+		print(compose(func, inv)(0.5));
+	}
+}