Add tasks for all the new languages

Task/Pangram-checker/Ceylon/pangram-checker.ceylon

@@ -0,0 +1,17 @@
+shared void run() {
+
+	function pangram(String sentence) =>
+ 		let(alphabet = set('a'..'z'),
+			letters = set(sentence.lowercased.filter(alphabet.contains)))
+ 		letters == alphabet;
+
+ 	value sentences = [
+ 		"The quick brown fox jumps over the lazy dog",
+ 		"""Watch "Jeopardy!", Alex Trebek's fun TV quiz game.""",
+ 		"Pack my box with five dozen liquor jugs.",
+ 		"blah blah blah"
+ 	];
+ 	for(sentence in sentences) {
+ 		print("\"``sentence``\" is a pangram? ``pangram(sentence)``");
+ 	}
+}