title: Enable dropping a file onto a Ruby script
body: <p>I'm creating a small ruby script to resize images and save them in a specified directory. I'd like the application to be as transparent as possible.</p>
  
  <p>Is it possible to allow file dropping onto my Ruby script in all platforms? For instance, the user drags a file onto the script, which then takes the file path as an argument and resizes the image accordingly -- No GUI, no console, etc..</p>