Lock attributes functionality.

- [x] Make it working for products
  - [x] Add product attribute ho_import_profile and set the profile used to import the product.
  - [x] If an import has the <lock_attributes> option set all the attributes will be disabled on the product-page.
  - [x] Extra text is added to the attribute note: "Automatically filled by import %s".
- [ ] Make it working for categories
- [ ] Make it working for customers (?)

```XML
<name field="ProductDescription">
    <store_view>
        <default field="ProductDescriptionOtherLang"/>
    </store_view>
</name>
```

Name is imported on the `admin` scope:
![schermafbeelding 2014-09-11 om 16 29 27](https://cloud.githubusercontent.com/assets/1244416/4235530/2f3b36e8-39c0-11e4-92a3-515162e66771.png)

Name is also imported for the `default` store view:
![schermafbeelding 2014-09-11 om 16 30 02](https://cloud.githubusercontent.com/assets/1244416/4235531/30aa81d2-39c0-11e4-8bc2-ec10d07c250d.png)

Name isn't import for the `second` store view and thus not locked.
![schermafbeelding 2014-09-11 om 16 30 13](https://cloud.githubusercontent.com/assets/1244416/4235542/3e958ac6-39c0-11e4-9f3f-3f0cdf0b3dd7.png)