Add a "Parent" layer wrapper, which exists only to hold child layers.
Update our skeleton of how to build a merge layer.
Implement ruminate-merging
Move merge.clj out of the way for a new ruminating approach
More work on ruminating merge
Update defwrapped to distinguish between "owned" layers and others
Make ruminate not own its output layers, or name them
Comment out pseudocode
Remove test that asserts implementation-details of old implementation
Comment out merge tests while we tear everything apart