Fixing license text in every file and adding the powered by requirement

mindplot/src/main/javascript/XMLMindmapSerializer_Beta.js

@@ -1,3 +1,18 @@
+/*    Copyright [2011] [wisemapping]
+*
+*   Licensed under the Apache License, Version 2.0 (the "License") plus the
+*   "powered by wisemapping" text requirement on every single page;
+*   you may not use this file except in compliance with the License.
+*   You may obtain a copy of the license at
+*
+*       http://www.wisemapping.org/license
+*
+*   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.
+*/
 mindplot.XMLMindmapSerializer_Beta = function()
 {