fixing CDN references on demo.html page

Hi sydcanem,

First off, I wanted to say thank you for making a really cool/useful plugin! When I opened up the demo.html page, I got the following:

![screen shot 2013-08-20 at 9 43 26 pm](https://f.cloud.github.com/assets/437318/998514/49e290a0-0a04-11e3-9769-356ab1b00041.png)

The page looked un-styled, and the console was throwing the following error messages:


     Uncaught SyntaxError: Unexpected token <                                     getbootstrap.com/2.3.2/:1
     Uncaught ReferenceError: prettyPrint is not defined                              demo.html:32


I just updated some of the CDN references to point towards valid resources (for Bootstrap, JQuery, etc...) so that the demo page renders correctly. After I made the updates, the page was rendering properly and not throwing the errors. I think this would be a good fix to ensure the demo is working properly.

Thanks!
-Rohit K