title: Issue with virtualenv - cannot activate
body: <p>I created a virtualenv around my project, but when I try to activate it I cannot.
  It might just be syntax or folder location, but I am stumped right now.</p>
  
  <p>You can see below, I create the virtualenv and call it venv. Everything looks good, then I try to activate it by running <code>source venv/bin/activate</code></p>
  
  <p>I'm thinking it might just have to do with my system path, but not sure what to point it to (I do know how to edit the path). I'm on python 7 / windows os, virtual env 2.2.x</p>
  
  <pre>
  Processing dependencies for virtualenv
  Finished processing dependencies for virtualenv
  
  c:\testdjangoproj\mysite>virtualenv --no-site-packages venv
  The --no-site-packages flag is deprecated; it is now the default behavior.
  Using real prefix 'C:\\Program Files (x86)\\Python'
  New python executable in venv\Scripts\python.exe
  File venv\Lib\distutils\distutils.cfg exists with different content; not overwri
  ting
  Installing setuptools.................done.
  Installing pip...................done.
  
  c:\testdjangoproj\mysite>source venv/bin/activate
  'source' is not recognized as an internal or external command,
  operable program or batch file.
  
  c:\testdjangoproj\mysite>source venv/bin/activate
  'source' is not recognized as an internal or external command,
  operable program or batch file.
  
  c:\testdjangoproj\mysite>source mysite/bin/activate
  'source' is not recognized as an internal or external command,
  operable program or batch file.
  
  c:\testdjangoproj\mysite>
  </pre>