Merge pull request #41 from FrancoisDupayrat/master

Add owner list.
Fixing various links, changing owner links and wiki_en fields to URL fields. Fixes #40 Fixes #38 Fixes #30
Fixing the migration file for owner URL fields
Adding owner logo information. Fixes #39 , fixes #26 .
New database dump for new pullers.
Most of us want to see the final result so we will use the images from POD. (Required for migrate 0015)

If you want to do upload tests, your should change MEDIA_URL to '/media/' for example.
Specs - new version
[admin,okfn/brand-manager#27] create a new widget to show the thumbnail in admin 'change' form
Fixing the PEP8.
Change display of brand list
Add logo in owner list