Add reusable properties delegations.
Autoload any subdirs off /models in the dummy application.
Generalize tests.
Rename nu_mods_datastream to mods_datastream.
Get content object working-ish again.
Skeleton dublin core spec.
Reenable wigwum and wumpus content objects, add lousy file content ds test ftm.
Update content object to implement extended mixins, add basic tests for that.
Add fits datastream to project