Close audio streams when recorder.stopRecord() is called

[dbhoot]

When you use the recorder to record audio ( calling recorder.startRecord() ), you are prompted for microphone access. When you're finished, calling stopRecord starts the audio encoding process but it doesn't stop the audio streams. The browser continues to show the microphone is live even though you've 'stopped' recording.

[dbhoot]

@sathyapulse, @logbon72 is anyone still actively maintaining this repo? I'm happy to help contribute to getting various changes into this library.

[sathyapulse]

@dbhoot I am not actively working on it.