Added dummy Projects and Web Log pages and added links to these pages

|WEB|
[/index.php]
* Using the new SiteHeader and SiteFooter PHP functions
[/common/default.css]
* Page links have a dark green colour when the cursor is not over it
* When the cursor is hovering over a link, the text colour is a bright green
  and the text increases in size
[/common/site.php]
* The site's header and footer are wrapped in a PHP function to allow them to
  be updated across all pages
[/projects/index.php]
* This is a dummy page for the Projects page
[/weblog/index.php]
* This is a dummy page for the Web Log page