New modal display

First, didn't notice any names in the readme! Who did you work on this with?

Everything except the modal was working spot-on. For the modal, I've added a new html element to help contain things. It's not ideal to modify the styles of the page itself since it can create some uncontrollable visuals in the future. In this case, the modal is now a standalone (and easily togglable) element on the page. I've centered the content and positioned it using auto margins.