Add route structure

Added products and sales resources to router.  Added placeholder templates for index, products and sales.  Updated application template with links to other pages.
Add product model and route

Loads a list of 3 products from the pretender server.
Add basic product template
Added product detail page

The products are now a list of links.  Selecting one gives the detail view.  This is a good example of how you can do master detail in Ember.
Added a sales model and route

Loads all sales
Loading products with sales

This allows us to traverse the relation and show the product name.
Display table of sales data

Added helpers for number, currency and date.  These will take care of formatting without having to modify the model.