title: Open an ipython notebook via double-click on osx
body: <p>I've downloaded a couple of ipython notebooks, and I'd like to open them in browser tabs without navigating to the directory I've downloaded them to and running <code>ipython notebook notebook_name.ipynb</code>. </p>
  
  <p>I realize this probably means I'm lazy, but it seems like a common use case to me. Am I missing something obvious?</p>