Submission pipeline - Process dies if pubmed service returns a bad result

[Raza Ali]

If the user enters a pubmed id that isnt valid or doesnt return the attributes required by the domain object, the submission process reports an (caught and handled) exception and terminates the process. A better approach would be to display the information available and require the user to fill out the remaining. This will likely require significant change to the objects in use (transport command objects instead of the objects themselves in the service functions).

[Raza Ali]

Fixed. PubMedService now returns whatever information it has about the publication from the webservice.