Squashed 'zsh/base16/' content from commit b78f738

git-subtree-dir: zsh/base16
git-subtree-split: b78f738e58880c3d51c0192a981303fb8a689fa6
Merge commit 'a154ea8974ac18a98f3d632cc6b20c053558fd97' as 'zsh/base16'
initial