npm_modules: Fork bower_components into Polymer 0.4.0 and 0.5.0 versions

polymer_0.5.0/bower_components/paper-checkbox/paper-checkbox.css

 /*
 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
 */
 
 :host {
   display: inline-block;
   white-space: nowrap;
 }
 
 :host(:focus) {
-  outline: none;
+  outline: 0;
 }
 
 #checkboxContainer {
   position: relative;
   width: 18px;
   height: 18px;
   cursor: pointer;
   -webkit-transform: translateZ(0);
   transform: translateZ(0);
 }
@@ skipping 227 matching lines @@
 
 /* disabled state */
 :host([disabled]) {
   pointer-events: none;
 }
 
 :host([disabled]) #checkbox {
   opacity: 0.33;
   border-color: #5a5a5a;
 }