Added Shopping Cart

Just getting started with the shopping cart module.
Added an Authentication Module

The new file resources/php/authentication.php will be housing
authentication code within the authentication namespace.
Merge branch 'master' into login
Function Name/Return Value Changed

Changed print_authenticatot to html_authenticator, which now returns an
html authenticator (currently a form).
? Ignoring future changes in config.php ?
Early Work on Authentication Module
Redirecting Page Everytime in Request Handler
Updated README