Updated script tags to load Firepad from our CDN

@mikelehen - Things aren't on the CDN just yet but I will get them there once you merge in the other PR to master. I was going to put firepad.js, firepad-min.js, firepad.css, and firepad.eot on the CDN. Should I also put firepad.zip on there?
Can you get rid of this comment as well as the "Download Firepad" link above?  Now that we have it on the CDN (and bower), there's really no reason to have a zip file for them to download.