Copyright (C) 2012 Esup Portail http://www.esup-portail.org
    Copyright (C) 2012 CUFR Jean François Champollion http://www.univ-jfc.fr
    @Author (C) 2012 Franck Bordinat <[email protected]>
   
    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.
    
    Part of this code is provided by BigBlueButton under the terms of the GNU 
    Lesser General Public License in API sample codes at
    		https://github.com/bigbluebutton/bigbluebutton/tree/master/bbb-api-demo