I had to do a bit of digging to find information about coordinate systems in
wgpu (asking on Matrix). This commit adds a table of coordinate systems to help
clarify the issue.
The table comes from the DX12 backend documentation of gfx-rs:
https://github.com/gfx-rs/gfx/tree/master/src/backend/dx12
Remove trailing newlines from README
Host coordinate images locally