Code cleanup

Simplified doctype (according to Lab1), encoded the special characters
(like &), made some divs into sections to be more semantic and easier to
reflow later. Wrapped package divs in one <a> so that the whole thing is
clickable.
Book Now page in place

Also did a few tweaks to the template like linking the logo to the
index.html and changing the footer headings to <h2>. Gave unique id
values to the bodies of the different pages so we can style certain
things page-specifically.
Some Book Now refinements.

Switched out some form elements with more appropriate ones, dropdowns
have options now. Looks a bit prettier, still needs some work.