Update unittest to new package layout.

tests/html/svgelement_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #library('SVGElementTest');
-#import('../../pkg/unittest/unittest.dart');
-#import('../../pkg/unittest/html_config.dart');
+#import('../../pkg/unittest/lib/unittest.dart');
+#import('../../pkg/unittest/lib/html_config.dart');
 #import('dart:html');
 
 main() {
   useHtmlConfiguration();
 
   Collection<String> _nodeStrings(Collection<Node> input) {
     final out = new List<String>();
     for (Node n in input) {
       if (n is Element) {
         Element e = n;
@@ skipping 163 matching lines @@
       Expect.listEquals(["circle", "path"], _nodeStrings(el.elements));
     });
 
     test('set', () {
       final el = new SVGSVGElement();
       el.elements = [new SVGElement.tag("circle"), new SVGElement.tag("path")];
       Expect.equals('<circle></circle><path></path>', el.innerHTML);
     });
   });
 }