Clean up old references to polymer-body

Add layout.html to karma config
Fixes Polymer#28

build/polymer.html

@@ -1,7 +1,12 @@
 <!--
- Copyright 2013 The Polymer Authors. All rights reserved.
- Use of this source code is governed by a BSD-style
- license that can be found in the LICENSE file.
+Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
 -->
-<script src="build/polymer.js"></script>
-<link rel="import" href="src/polymer-body.html">
+
+<link rel="import" href="layout.html">
+
+<script src="polymer.js"></script>

conf/karma.conf.js

@@ -43,7 +43,7 @@ module.exports = function(karma) {
       {pattern: 'polymer-expressions/tests/*.js', included: false},
       {pattern: 'TemplateBinding/tests/*.js', included: false},
       {pattern: 'polymer-dev/polymer.html', included: false},
-      {pattern: 'polymer-dev/src/polymer-body.html', included: false},
+      {pattern: 'polymer-dev/layout.html', included: false},
       {pattern: 'polymer-dev/src/**/*.js', included: false},
       {pattern: 'polymer-dev/build/polymer.js', included: false},
       {pattern: 'polymer-dev/test/**/*.css', included: false},