Add a Products View

Includes updates urls, a new form, template and a class based view.
It needs some CSS love, but otherwise works.
Actually, I'm sure of it:

```
saturn2 ~/mozilla/fjord> flake8 fjord/analytics/analyzer_views.py
fjord/analytics/analyzer_views.py:27:1: F401 'ObjectDoesNotExist' imported but unused
fjord/analytics/analyzer_views.py:28:1: F401 'messages' imported but unused
```