Added a CSS file to improve the look of the site

|WEB|
[/index.php]
* Changed the background colour to a deeper red
* Using the VT323 font from Google Fonts
* The CSS file is used to format the page
[/common/default.css]
* The contents of the site are limited to 770px wide to accomodate most web
  browser windows
* The header id provides enough spacing to allow the header to not interfere
  with the page's contents
* The footer id is used to force the footer section to the floor of the page