Restructure pkg/unittest and pkg/webdriver to follow the pub conventions.

pkg/intl/test/date_time_format_http_request_test.dart

Index: pkg/intl/test/date_time_format_http_request_test.dart
===================================================================
--- pkg/intl/test/date_time_format_http_request_test.dart	(revision 14313)
+++ pkg/intl/test/date_time_format_http_request_test.dart	(working copy)
@@ -7,13 +7,13 @@
  * to a server.
  */
 
-#library('date_time_format_http_request_test');
+library 'date_time_format_http_request_test';
 
-#import('../lib/intl.dart');
-#import('../lib/date_symbol_data_http_request.dart');
-#import('date_time_format_test_core.dart');
-#import('dart:html');
-#import('../../../pkg/unittest/unittest.dart');
+import '../lib/intl.dart';
+import '../lib/date_symbol_data_http_request.dart';
+import 'date_time_format_test_core.dart';
+import 'dart:html';
+import '../../../pkg/unittest/lib/unittest.dart')
 
 var url = "http://localhost:9876/pkg/intl/lib/src/data/dates/";