Merging, updating, and reorganizing

Merging: css files, index.php
Updating: updated all php files to have the links navigating to each
other; updated the header to link to index.php; swapped “about us” and
“cancel” position
Reorganizing: copied Jay’s manager folder to be not so nested for
cleaner code.

also tweak’d jay’s code for the CSS class highlighting and change
“index.html” to “index.php”