Squashed 'bundle/unite-outline/' content from commit a6240f9

git-subtree-dir: bundle/unite-outline
git-subtree-split: a6240f9982a1c3693020453e7e88fa355458cdad
Merge commit '3467592af4169c8aa07d30e00c6413b3b065a99a' as 'bundle/unite-outline'