Add ordering functionality
- generate order model and controller
- associate order and line items
- set up form for capturing order details
- validate form details
- create new order records in db and clear cart
- add ajax to remove note once item added to cart after
  a successfull order is placed.
add atom feed for live updates of orders as they come in
generate mailer for oder notifications and build basic mail templates for it
all tests passing for email notifiers
add integration testing and ensure all tests are passing