Small Fixes

- './cart.php' no longer includes './php/cart/CartManager.php'; the file
was already included via './header.php'
Database Fix

- Pushing database fixes
Logout Link Redirect

- The user is now redirected to './index.php' when he/she clicks any DOM
element with an id equal to '#logout'
- Commented some weird code in header.php ... not sure what it does, but
it was not working
Add Item AJAX Tweak

- './php/cart/ajax/cart_add_item.php' now includes
'./Account/AccountManager.php' via relative path
- './Account/AccountManager.php' now includes './db_connect.php' via
relative path
- './php/cart/ajax/cart_add_item.php' no longer adds an item to the cart
if the user is not logged in
Merge pull request #18 from uptownjimmy/cartfunctionality

Cartfunctionality