title: PTVS using os.system fails
body: <p>I am having an issue with Visual Studio.
  I have everything set up in my project in the Python Environments including Platformio, which I would like to use.</p>
  
  <p>When I do
  <code>os.system("platformio init")</code> it fails and produces this error:</p>
  
  <p><code>'platformio' is not recognized as an internal or external command, operable program or batch file.</code></p>
  
  <p>I added the platformio folder in the python library Search Paths, but still no success.</p>
  
  <p>I do not have python or platformio installed on the local machine, only in the PTVS.
  The python program works fine without installing it on the local machine, so I would like to maintain it that way if possible.</p>
  
  <p>Please anyone, help!</p>