Squashed 'vendor/' changes from d0da4ae..179e40a

179e40a fix readme install
ee6d7f7 add readme

git-subtree-dir: vendor
git-subtree-split: 179e40a58442f3c32eb13f8c716e31f817d64306
Merge commit 'fec4293ee53ebd17b7ac6974f788349902dd840a'