Exporting patch masks does not automatically make a PatchStack, which forces them to all be the same size

By default, return non-expanded patches and masks; allow contour and mask overlays in non-expanded patches

Standardize patch (mask) getters return ad-hoc DataFrames, and _acc methods wrap these in PatchStack accessors (which automatically become shape of largest patch)

Removed solidity from features, this was no longer being used and was triggering convex hull warnings

Implementing alternative dataframe generation where z-positions are in object map, i.e. do not need to be de-projected from raw

Implemented and tested object identity labeling in 3D with and without connectivity between z-frames

Cleared up issues with Singleton behavior, largely confused by the fact this python logger itself is a Singleton that persists between tests

Mocked up session logging implementation using python log service; two tests are failing apparently due to Session singleton-related issues

record entry returned by object class map export is no longer a dictionary of paths, but rather one path for object map

API test cases now call PUT through an internal method with re-attempts built in; trying to eliminate lost connections during testing but some still happen