repositioned header

seperated header and body into different divs

header now spans entire page width

created centered menu (still need to choose font-family, size, etc)

added code for gradient background found at
http://www.gradient-animator.com/. Commented out code for now, as it
does not work for some reason (probably something very simple)

Numerous other changes. I'm thinking of removing the footer menu
entirely, or maybe centering it the bottom of the main "container" div.