在运行docker-machine scp 命令的时候，报错：
"You must have a copy of the scp binary locally to use the scp feature"
【解决方法】
It Works!... just adding path to ...Git\usr\bin ... where scp.exe is ... to the PATH environment variable.
From: https://forums.docker.com/t/you-must-have-a-copy-of-the-scp-binary-locally-to-use-the-scp-feature/29260/7
