Add 'ctan/' from commit 'd1dcd0d14efd4b8edb6e3b664d84b1188e60cd74'

git-subtree-dir: ctan
git-subtree-mainline: 5b715c5619ec9613b49bb5d0abd9fb914638b855
git-subtree-split: d1dcd0d14efd4b8edb6e3b664d84b1188e60cd74
add CTAN example