add single files, secure server, hello world

single_file_tests/http_client.dart

@@ -0,0 +1,15 @@
+import 'dart:io';
+import 'dart:convert';
+
+main() async {
+  var url = Uri.parse('https://hatter.ink/ip/ip.jsonp');
+  var httpClient = new HttpClient();
+  var request = await httpClient.getUrl(url);
+  print('have request');
+  var response = await request.close();
+  print('have response');
+  var data = await response.transform(utf8.decoder).toList();
+  var body = data.join('');
+  print(body);
+  httpClient.close();
+}