Use the full organization dict to display orgs

The package page uses only the bits of the organization dict that is returned
from package_show, this doesn't have the image_display_url and therefore
organization images are not shown anymore. This uses a new helper to get the
full organization dict.
Merge branch 'master' into 1592-pkg-org-img
[#1674] Add policy that pull requests shouldn't lower the test coverage
Catch NotFound error in resource_proxy
Add tests for non-existent resource
Catch NotFound, ValidationError, and NotAuthorized
[#1711] prevent membership update when updating orgs
[#1708] Use data-module attribute in custom-fields JavaScript module
[#1711] document packages ignored by organization_update
[#1711] reduce context unpleasantness
[#1711] group_dict_save: save extras before session.commit+rebuild
Merge branch '1592-pkg-org-img'
Merge branch '1674-new-code-shouldnt-lower-coverage'
[#1684] Wrap error message in _
Merge pull request #1716 from rparrapy/1708-use-data-module-attribute-in-custom-fields

[#1708] Use data-module attribute in custom-fields JavaScript module
import _
Merge branch 'resource-proxy-404'
Merge pull request #1711 from wardi/1711-organization-update-notfound-package

 prevent packages update in organization_update