title: PyCharm doesn't recognise my VirtualEnv installed modules
body: <p>I started a project without PyCharm and I setup a VirtualEnv which I have installed Django, Pillow etc.</p>
  
  <p>I have imported the project to PyCharm and even if I configured the Project Interpreter to the location of the VirtualEnv, PyCharm seems that don't recognise the installed modules in this virtual environment.</p>
  
  <p>The project interpreter location looks like this:</p>
  
  <pre><code>path/to/project/virtualenv_folder/bin/python3.5
  </code></pre>
  
  <p>Now PyCharm Project Interpreter has only the basic packages shown in the table like pip, setuptools, wheel but not the ones I have in virtualenv which are Django, Pillow.</p>
  
  <p>I am sure that the packages are installed in that virtualenv because I did:</p>
  
  <pre><code>source path/to/project/virtualenv_folder/bin/activate
  pip freeze
  </code></pre>
  
  <p>And the packages are there. I search all the documentations of JetBrain and I couldn't find anything.</p>
  
  <p>PyCharm Version: Professional 2016.1</p>