For clarity, renames itemArrayController to itemEntityController.
Exposes a less specific value transformer past the view model. Now instead of having view controllers bind to contentID with a contentID->image transformer, they just bind to the item and an item -> image transformer.
Moves most of the omnibar view controller logic into the view model where it belongs. The VC now just forwards the text.
Bugfix: NSURL returns valid a string like "test", gotta test if it has a host component to separate out tags from downloadable URLs. Plus, by having a separate function, it'll be easier to expand out into further validation tests.
Moves the dance of downloading-then-storing-in-coredata for new items from the view model back to the model, exposing a single method in the services to do both.
Adds some notes on a theory for how I could bind array controllers to each other (not working, nor worth the effort right now), and creates an architecture diagram.