Adds new application: kitchen

Adds new models to the application
'kitchen' and registers it in the
admin model.
Fixed navigation menu and media files

Added a line to eshop.urls that enables the
media files to be be visible:
+ static(base.MEDIA_URL, document_root=base.MEDIA_ROOT).
this needs several imports:
- from django.conf.urls.static import static
- from eshop.settings import base

Also fixed navigation menu:
the nav menu stayed hard-coded but passes the variable
which passes the category name. So in the views you
can pick the products for the selected category.

Added some products to the database.
See previous commit