readme edits

Nate - I found your project via David Haynes / 16:9. I cleaned up and reformatted your readme file in proper markdown so that it renders correctly. Also - the [demo page](http://pixelydo.com/flatscreens) seems to be down. I dig what you're doing (and I'm a longtime WP fan/hacker too), so let me know how I can help maintain this project.