Added has_many :sales association to Customer model
Added belongs_to associations for employee, customer, & product, has_many :invoices to Sale model
added has_many :sales association to Employee model
Added belongs_to :sale association to Invoice model
Added has_many :sales association to Product model
Added Employees index & show routes
Created employees controller & view
added last name to header in Employees show page
added products routes for index and show
created Products controller and view
created new customers controller and view - not yet modified
added index and show actions in customers controller
added routes for customers index & show actions
created views for customers index & show actions
generated migration to fix websites in customers table
generated new controller for sales
added routes for sales index & show actions
added index & show actions to sales controller
modified index action in sales controller to return only sales in the last 13 months
moved sales_in_last_13_months functionality from sales controller into sale model