Added license to bbb-voice

...in/java/org/bigbluebutton/voiceconf/red5/Application.java

...a/org/bigbluebutton/voiceconf/red5/CallStreamFactory.java

...va/org/bigbluebutton/voiceconf/red5/ClientConnection.java

...bigbluebutton/voiceconf/red5/ClientConnectionManager.java

...c/main/java/org/bigbluebutton/voiceconf/red5/Service.java

...bluebutton/voiceconf/red5/media/AudioBroadcastStream.java

...org/bigbluebutton/voiceconf/red5/media/AudioByteData.java

...va/org/bigbluebutton/voiceconf/red5/media/CallStream.java

...igbluebutton/voiceconf/red5/media/CallStreamObserver.java

...luebutton/voiceconf/red5/media/FlashToSipAudioStream.java

...bigbluebutton/voiceconf/red5/media/RtpStreamReceiver.java

...utton/voiceconf/red5/media/RtpStreamReceiverListener.java

...g/bigbluebutton/voiceconf/red5/media/RtpStreamSender.java

...luebutton/voiceconf/red5/media/SipToFlashAudioStream.java

...g/bigbluebutton/voiceconf/red5/media/StreamException.java

...rg/bigbluebutton/voiceconf/red5/media/StreamObserver.java

...org/bigbluebutton/voiceconf/red5/media/net/RtpPacket.java

...org/bigbluebutton/voiceconf/red5/media/net/RtpSocket.java

...voiceconf/red5/media/transcoder/FlashToSipTranscoder.java

...f/red5/media/transcoder/NellyFlashToSipTranscoderImp.java