title: Pycharm can't change interpreter from python 2.7 to 3.4
body: <p>Im currently working on an open source Python project on Xubuntu Linux 3.19.0-51-generic x86_64 using Pycharm.
  Even though I my project requires Python 3.4 or greater, the IDE seems to force the project to use Python 2.7. I've tried to change the interpreter from the Project Interpreter menu (see screenshot), and went so far as to remove the Python 2.7 entry from the Project Interpreter menu..All to no avail. I have attached a screenshot of Project Interpreter menu and here is the first line of my debugger session to illustrate the problem:</p>
  
  <pre><code>/usr/bin/python2.7 /home/bluejay/pycharm/pycharm-community-2016.2.1/helpers/pydev/pydevd.py --cmd-line --multiproc --qt-support --client 127.0.0.1 --port 45167 --file /root/PycharmProjects/anki/runanki
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/JWpB1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JWpB1.png" alt="Project Interpreter Menu"></a></p>
  
  <p>Any help is vastly appreciated!</p>