If there are apostrophes in the title, Disqus breaks

You end up with a Disqus title that looks like this:
window.disqus_title = 'Stay Pure and Don't Become a Mutant';

Which doesn't work.

If we replace the apostrophe with an escaped version, it shows up in Disqus perfectly.
Merge pull request #25 from troykershaw/patch-1

Fix for apostrophes in Disqus title