Squashed 'slogger/' content from commit 9324984

git-subtree-dir: slogger
git-subtree-split: 932498453a21cb39df7681d4a476fa19f1eb7f84
Merge commit '3f96d62062dd52e40cea6d7dca7bf2bf0e4f50ee' as 'slogger'
make script/install run more smoothly
slogger install file