Fix Contacts view too slow to display

The 'base' Kanban view for res.partner in 9.0 loads the large 'image'
field in the 'search_read' but display the 'small_image'. The js code
also has to issue js calls to get the small images as they have not been
prefetched. This is noticeably slow to load when the large images are
read from S3 which is slower than a local filesystem/database.

This fix loads the 'small_image' instead of the large one.

This bug has been fixed in Odoo 10.0.

attachment_s3/__openerp__.py

@@ -14,6 +14,8 @@
      'python': ['boto'],
  },
  'website': 'http://www.camptocamp.com',
- 'data': [],
+ 'data': [
+     'views/res_partner_views.xml',
+ ],
  'installable': True,
  }