Fixed documentation, count is now a property and not a method.

docs/functions.html

@@ -146,7 +146,7 @@
 	// sum modified to accept a variable number of arguments
 	func sum() {
 		var tot = 0;
-		for (var i in 0..<_args.count()) {
+		for (var i in 0..<_args.count) {
 			tot += _args[i];
 		}
 		return tot;