title: How to download all dependencies and packages to directory
body: <p>I'm trying to install a package on a machine with no Internet connection. What I want to do is download all the packages and dependences on a machine WITH an Internet connection and then sneaker-net everything to the offline computer.</p>
  
  <p>I've been playing with the <code>apt-get</code> and <code>apt-cache</code> but I haven't figured out a quick and easy way to download the package and dependencies in one swoop to a directory of my choosing. How would I do this? Am I going about this problem correctly?
  How would you install offline packages that have a lot of dependencies?</p>