title: RxJS: what is bufferSize in shareReplay?
body: <p>I don't understand what <code>bufferSize</code> parameter means and what does it effect.</p>
  <p>What are the differences between the following?</p>
  <pre><code>var published = source
      .shareReplay();
  
  var published = source
      .shareReplay(0)
  
  var published = source
      .shareReplay(1);
  
  var published = source
      .shareReplay(10);
  </code></pre>