Relax condition in parseContextObject
Relax condition in parseContextObject

Especially, allow rft.subject and rft.description in core OpenURL without Dublin Core declared as format. This fixes #851

sendecomp/zotero,gracile-fr/zotero,rmzelle/zotero,retorquere/zotero,retorquere/zotero,gracile-fr/zotero,gracile-fr/zotero,retorquere/zotero,rmzelle/zotero,rmzelle/zotero,LinuxMercedes/zotero,sendecomp/zotero,LinuxMercedes/zotero,LinuxMercedes/zotero,sendecomp/zotero