Change from custom field reference to og_ref field.

Change some views.
Add archive of important messages.
Merge branch 'feature/#405-archive-and-delete-rewrite' into develop

Conflicts:
	os2intra_message_notify.module
Merge branch 'develop' of https://github.com/bellcom/os2intra_message_notify into develop

Conflicts:
	os2intra_message_notify.module