add liscense to js files

js/bootstrap-popover.js

@@ -1,17 +1,34 @@
- /* EXTENDS BOOTSTRAP-TWIPSY.js
-    =========================== */
+/* ===========================================================
+ * bootstrap-popover.js
+ * http://twitter.github.com/bootstrap/javascript.html#popover
+ * ===========================================================
+ * Copyright 2011 Twitter, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * =========================================================== */
+
 
 (function( $ ) {
 
- /* POPOVER PUBLIC CLASS DEFINITION
-  * ============================== */
-
   var Popover = function ( element, options ) {
     this.$element = $(element)
     this.options = options
     this.enabled = true
   }
 
+  /* NOTE: POPOVER EXTENDS BOOTSTRAP-TWIPSY.js
+     ========================================= */
+
   Popover.prototype = $.extend({}, $.fn.twipsy.Twipsy.prototype, {
 
     setContent: function () {