title: How to merge all the content of a branch to another branch?
body: <p>I'm new to the world of git, and also to <code>Atlassian</code> and <code>SourceTree</code>, so I've very basic about this.
  What I want achieve is that:</p>
  
  <p>Suppose that I've a branch called <code>master</code>, which I develop my application with all new features and bugfix, and another branch called <code>release</code>, what I want to do is merge all the content of the <code>master</code> branch, to ther <code>release</code> branch.</p>
  
  <p>What I did so far:</p>
  
  <ol>
  <li><p>Selected the <code>master</code> branch on the <code>branches</code> view on the left of <code>SourceTree</code></p></li>
  <li><p>Clicked on the <code>join</code> button on the header of <code>SourceTree</code> and then on <code>Ok</code>.</p></li>
  <li><p>Clicked on the <code>Send</code> button on the header of <code>SourceTree</code>.</p></li>
  </ol>
  
  <p>After the step 3, nothing happen, in my <code>BitBucket</code> repository I doesn't see any <code>Release</code> branch, I've actually created this branch on <code>SourceTree</code> only. Someone could tell me what am I doing wrong?</p>
  
  <p>Thanks. </p>