add single files, secure server, hello world

single_file_tests/showmyip.dart

@@ -0,0 +1,16 @@
+#!/usr/bin/env dart
+
+import 'dart:io';
+import 'dart:convert';
+
+main() async {
+  final url = Uri.parse('https://hatter.ink/ip/ip.jsonp');
+  final httpClient = new HttpClient();
+  httpClient.connectionTimeout = const Duration(seconds: 6);
+  final request = await httpClient.getUrl(url);
+  final response = await request.close();
+  final data = await response.transform(utf8.decoder).toList();
+  final body = data.join('');
+  print(body);
+  httpClient.close();
+}