title: Install specific version of PyTorch to conda environment
body: <p>Using <code>Anaconda Navigator</code> I created a new environment for running someone's <code>VAE</code> code off <code>GitHub</code> that uses Python 3.6 and PyTorch 0.4.0. Unfortunately, <code>Anaconda Navigator</code> doesn't give me the option to install an older version of <code>PyTorch</code> on this environment, just the <code>PyTorch</code> version I have currently installed. How do I install <code>PyTorch 0.4.0</code> only to this new <code>Conda environment</code> I created? If it's possible via <code>Anaconda Navigator</code>, great! But I assume it's going to be done via a <code>Conda command</code>. I definitely don't want to mess up my other environments. </p>
  
  <p>Thanks!</p>