Add '.zsh_plugins/colored-man/' from commit '6d4a2473daaf0a31b47065e4f5b71129891cf748'

git-subtree-dir: .zsh_plugins/colored-man
git-subtree-mainline: 179fab5626372e9e1944680057b92dfddd787acd
git-subtree-split: 6d4a2473daaf0a31b47065e4f5b71129891cf748
update README