The home page link correctly re-directs to the home page

|WEB|
[common/default.css]
* For the header's link to not display as the same green for the other links,
  the a and a:hover elements colours are explicitly specified in a separate
  section
[common/site.php]
* The main link back to the home page is enclosed in a div section to allow the
  links to not appear the same as on the rest of the site
* Updated the links for Projects and Web Log to be relative to the root