-- Boolean operations (experimental)
-- Major improvements to GdsImport:
-- Refactored GdsImport to properly handle referenced Cells
-- Fixed bug that broke import of Text elements
-- verbosity=2 prints imported records
-- Fixed x_reflection when showing referenced Cells
-- Changed str and repr to give more and less info on core elements.
-- Text objects are included in show() autoscaling
-- Added levels of verbosity to GdsImport
-- Cell and Layout now support created and modified dates
-- Path endcaps and vertices now render correctly with show
-- Introduced laydat tuple combining layer and datatype
-- Introduced object selection methods for Cell