title: JGitFlow maven plugin release-start from custom branch
body: <p>Is it possible to make a release from custom branch (not <code>develop</code>)?</p>
  
  <p>I tried to use <code>startCommit</code> command, but Maven JGitFlow plugin has been switched to the <code>develop</code> branch before release is started.</p>
  
  <p>Also, when I changed git configuration manually, it was automatically changed to <code>develop</code>.</p>
  
  <p>I would like to use following steps:</p>
  
  <ol>
  <li><code>release-start</code> - create release branch</li>
  <li><code>release-finish</code> - create tag, merge to the master and develop, update <code>pom.xml</code> versions.</li>
  <li>Issue found</li>
  <li>Create a branch from tagged version</li>
  <li>Fix issues there</li>
  <li>Make another release from that branch</li>
  </ol>