lua euler
Squashed 'lua_euler/' content from commit bcb2fd6

git-subtree-dir: lua_euler
git-subtree-split: bcb2fd6ae8db9cca347afa8c132ffb6cbecf4e1b
Merge commit 'e4ed08e2ec7dfcac01e089551c69ba300e5d54a6' as 'lua_euler'