[_] 16% general tasks
	[_] 0% save diffs in pickle overlays...
	| need fast and simple way to save changes to a new spot...
		[_] 0% IDEA: use pli.logictypes.DictUnion
			[_] create a new layer on load
			[_] save only updated layers and create a new empty layer on save
	[_] 0% compleate the new tags module
		[_] .relatedtags(...)
		[_] concatinative mode or abbility to build new tagsets from selections
	[_] import test images and ratings
	[_] importer based on xmpgen
	[X] need unique image id