Add a Products View

Includes updates urls, a new form, template and a class based view.
It needs some CSS love, but otherwise works.
There are a bunch of other fields that we should display in this list. However, given that your'e doing the form like you're doing it, you might as well replace the existing "analytics_products" view function with this one, but use the HTML from that template to display the product table.

The view is in `fjord/analyzers/analyzer_views.py` `analytics_products`.

The template for that view is in `fjord/analyzers/templates/analytics/analyzer/products.html`.