[PATCH] Embellish admin model change lists

[Jeremy Kerr]

Hi Dirk,

> Add fields to the admin change list pages of patchwork models, and add
> filters and search boxes where appropriate.

Applied, with one change:

>  class UserProfileAdmin(admin.ModelAdmin):
> -    pass
> +    search_fields = ('user__first_name', 'user__last_name')

I've added user__username to this list, as I often need to lookup by username 
too.

Cheers,


Jeremy