Revert "gitignore tutorials and contents of output and uploads folders, as well as DS_Store files if they happen."

This reverts commit e1e44cbd6780c68ea8dc4e1db7719515e95de852.
Revert "Revert "gitignore tutorials and contents of output and uploads folders, as well as DS_Store files if they happen.""

This reverts commit e550a901532726ad917663f23568f74e09e3c235.
Revert "gitignore tutorials and contents of output and uploads folders, as well as DS_Store files if they happen."

This reverts commit e1e44cbd6780c68ea8dc4e1db7719515e95de852.
I am too dense to figure out git revert without seeing it in action.