Allow viewing of newspaper issues without newspapers.
Allow issues to be ingested outside of newspapers.

Would have additionally thrown an error due to not finding an
"isMemberOf" relationship, as collections typically use
"isMemberOfCollection".
Allow orphaned newspaper objects to be viewed...

... So they can be deleted.
Merge pull request #78 from adam-vessey/7.x-1.3

7.x 1.3