Remove text-decoration from links on hover, focus
Merge pull request #32 from nitstorm/links_no_underline

Removed text-decoration from links on hover and focus.
Added locally-hosted image for advertisers.
Added page detailing advertising options and linked to it with banner on home page (closes #9).
A couple of minor stylistic changes and fixed the incorrect count for articles and users displayed on About page.
Added 'popup' parameter for image upload form to show/hide the navbar and footer.