title: how to clone a repo to a virtualenv on mac Mountain Lion
body: <p>I could be missing something fundamental here, but I'm struggling to work out what.</p>
  
  <p>I'm using Github for Mac for the first time. I've found a repo i want to look at, so I've logged into GH and installed and configured the mac app.</p>
  
  <p>I've created a virtualenv that I want to work in. added python 2.7.</p>
  
  <p>I've forked the repo on GH. Then I've hit the clone to mac button. this works fine and asks me where i want to put it. the problem is here, the only action is to overwrite the whole directory. which isnt good.</p>
  
  <p>ive checked the help for virtualenv and theres no convert to virtualenv option, which would allow me to download the project then make it a virtualenv.
  im aware that i can probably get by with a copy and paste operation and two different folders, but this seems silly. Is there an easier way to accomplish this?</p>