Fixes typos in README.md
Adds index.html, main.css, and main.js (fresh/blank files)

- Easily added
    - From command line via `touch index.html main.css main.js`
    - OR From within Sublime Text `New File Relative to Project Root`
        - OR `CMD+N` -> `Save` -> Save File via Finder
    - OR ... god forbid, straight from Finder.
Adds `html:5` boilerplate to index.html and content to main.{js,css}

- `html:5` via Emmet
- main.{js,css} content is truly ugly garbage