Fixes an error that occurs when moving the document by setting another link ID or Scope path. This is due to the fact that author is a required property in the Work model.
Fixes an error that occurs when moving the document by setting another link ID or Scope path. This is due to the fact that author is a required property in the Work model.

Patch by: Lennard de Rijk

--HG--
extra : convert_revision : svn%3A32761e7d-7263-4528-b7be-7235b26367ec/trunk%401166

rhyolight/nupic.son,rhyolight/nupic.son,rhyolight/nupic.son