MFEKglif v2.0.0-beta1 — “Repetitive Spline Injury”

This is a major pre-release of MFEKglif with contributions mostly from @MatthewBlanchard. New in this version is we now support OpenGL once again, and all of the difficulty around getting Vulkan to work is gone across all operating systems :-)

We have a much better egui UI, the dependency on Dear ImGui is dropped.

With this new stability, and much easier to hack UI, we hope to make many improvements in this new v2 series.