pcb-rnd 1.2.1 ~~~~~~~~~~~~~~ With a new peak in number of developers and contributors, version 1.2.1 introduces a large amount of bug fixes, cleanups and new features that can be sorted in the following main groups. 1. Layer model rewrite; pcb-rnd now has a clear separation of physical layer and logical layer concepts. There's new, board cross-section GUI to visualize and manipulate the layer stack. 2. The hid_gtk refactoring; big, monolithic code blocks are split up in smaller, more independent, lib-like modules and are moved to a lib plugin. This paves the road for a modular setup to support multiple graphic renderings and maybe even different gtk versions. 3. Automated testing and validation: a new infrastructure for automated testing of exporters is added. The reference PNG files are manually validated against the input PCB geometry - by now, we know exactly how much error the PNG rendering has. 4. UI fixes: better rubber band, xor-outline-while-moving and DRC outline visualization support. 5. Introducing the "EDA ecosystem" idea: real working import/export bridges or flows to fidocadj, freerouting.net, ltspice, mucs and TinyCAD. Major improvements in the KiCad file format compatibility. 6. The toporouter got removed in favor of the new routers for now.