2024-06-03

This release:

• corrects a bug that — although not local to that machines — was most likely to miscolour the left border of the Vic-20 if it had changed close to horizontal retrace; and
• adds the Archimedes' quick-load configuration option to the SDL command line, while also adding the Archimides itself to the Qt machine picker.

For those building for themselves and for the inevitable future, the code is also now completely valid C++20, having previously stumbled over a difference in the way std::memory_order is declared between C++17 and C++20.