Debugger added
Gems updated
link content-tab to children for DOs

- The content-tabs usually links to entities,
  but DOs do not have entities, so we link to
  the children instead.
Merge pull request #255 from ontohub/correcting162_create_versions_on_children

Correcting162 create versions on children
No exception if permission for first user already exists.
Removed extra permission, first user is already owner.
Merge branch 'staging' into develop

Conflicts:
	Gemfile
	Gemfile.lock