add explicit copyright header to docs CSS & JS files; fixes #11112

docs-assets/css/docs.css

+/*!
+ * Copyright 2013 Twitter, Inc.
+ * This work is licensed under the Creative Commons Attribution 3.0 Unported License.
+ * You should have received a copy of this license along with this work.
+ * If not, visit http://creativecommons.org/licenses/by/3.0/ .
+ */
 /*
  * Bootstrap Documentation
  * Special styles for presenting Bootstrap's documentation and code examples.

docs-assets/js/application.js

 // NOTICE!! DO NOT USE ANY OF THIS JAVASCRIPT
 // IT'S ALL JUST JUNK FOR OUR DOCS!
 // ++++++++++++++++++++++++++++++++++++++++++
+/*!
+ * Copyright 2013 Twitter, Inc.
+ * This work is licensed under the Creative Commons Attribution 3.0 Unported License.
+ * You should have received a copy of this license along with this work.
+ * If not, visit http://creativecommons.org/licenses/by/3.0/ .
+ */
+
 
 !function ($) {
 

docs-assets/js/customizer.js

+/*!
+ * Copyright 2013 Twitter, Inc.
+ * This work is licensed under the Creative Commons Attribution 3.0 Unported License.
+ * You should have received a copy of this license along with this work.
+ * If not, visit http://creativecommons.org/licenses/by/3.0/ .
+ */
+
+
 window.onload = function () { // wait for load in a dumb way because B-0
   var cw = '/*!\n * Bootstrap v3.0.0\n *\n * Copyright 2013 Twitter, Inc\n * Licensed under the Apache License v2.0\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Designed and built with all the love in the world @twitter by @mdo and @fat.\n */\n\n'