Added license for bigbluebutton-apps

...rg/bigbluebutton/conference/BigBlueButtonApplication.java

...va/org/bigbluebutton/conference/BigBlueButtonService.java

...va/org/bigbluebutton/conference/BigBlueButtonSession.java

...java/org/bigbluebutton/conference/BigBlueButtonUtils.java

...main/java/org/bigbluebutton/conference/ClientMessage.java

...rg/bigbluebutton/conference/ConnectionInvokerService.java

...src/main/java/org/bigbluebutton/conference/Constants.java

...main/java/org/bigbluebutton/conference/IRoomListener.java

...luebutton/conference/ParticipantUpdatingRoomListener.java

...apps/src/main/java/org/bigbluebutton/conference/Room.java

.../main/java/org/bigbluebutton/conference/RoomListener.java

.../main/java/org/bigbluebutton/conference/RoomsManager.java

...apps/src/main/java/org/bigbluebutton/conference/User.java

...igbluebutton/conference/service/chat/ChatApplication.java

...rg/bigbluebutton/conference/service/chat/ChatHandler.java

.../bigbluebutton/conference/service/chat/ChatMessageVO.java

...a/org/bigbluebutton/conference/service/chat/ChatRoom.java

...gbluebutton/conference/service/chat/ChatRoomsManager.java

...rg/bigbluebutton/conference/service/chat/ChatService.java

...bluebutton/conference/service/chat/IChatRoomListener.java