How To Set Line Endings in Smultron for your WordPress Themes

About 5 minutes after releasing my first WordPress theme, Theseus, upon the world, I had my first support ticket to deal with: A Parse Error. The problem is, I work on a Mac and Macs handle line endings differently than everyone else. Different as in, make Unix computers explode. Unfortunately for me, a lot of web servers are UNIX computers. That explode.