Create a standalone version of the HTML slide deck by inlining JS & CSS

[technopagan]

Currently, if you want to use "file://" instead of a local webserver, you can't use Chrome. Firefox works fine, but Chrome prevents loading linked assets such as CSS + JS from file:// URLs for (frankly overexaggerated) security concerns.

To make the slide deck tool work under all browsers regardless of their security settings, we can inline the CSS + JS into the HTML.

To keep up the maintainability of the code, we should create a "src" subdirectory inside this repository, in which we'll store the separate JS + CSS files.