title: Download python package with dependencies without installing
body: <p>I need to download a python package with all its dependencies without installing, sneaker-net it to a computer without connection to the internet, and install it there. For example, I want to install buildbot, lettuce, etc.</p>
  
  <p>The computer is a Windows 7 machine, using Python 2.7.
  If the package has native extensions, I can build them on the computer.</p>