Most are non-user facing. Hope this is not too annoying of a PR.
Used `codespell -d -q 3 --skip="*.po,*.ts,./.git,./external"` to locate typos
Former-commit-id: dc31807ff5
Use CMake's "configure_file" functionality to store path to the tutorial
shared directory, enabling tutorial executables build out of source to
correctly find the data files.
Former-commit-id: a0eed05e8b