Codebase cleanup

[ajmeese7]

I instituted a relatively uniform style throughout the entire project, as before it haphazardly changed across files and often within the same file.

I also updated the README to have a cleaner look that better reflects the professional style of the extension.

Sidenote: the options page doesn't work in the new Firefox. The instructions for proper implementation are located here. You will most likely need a second options.html file for Firefox, because just loading the current one with

"options_ui": {
  "page": "options.html"
}

loads it in as something that closely resembles an iFrame, and it is not attractive or functional at all. I would be willing to work on this if you want me to.