fixed issue with env replacement on windows for subprocess by copying the current environment and ensuring PATH is a str and not unicode
fixed issue with env replacement on windows for subprocess by copying the current environment and ensuring PATH is a str and not unicode

grow/pygrow,denmojo/pygrow,denmojo/pygrow,denmojo/pygrow,grow/grow,grow/grow,grow/pygrow,grow/pygrow,denmojo/pygrow,grow/grow,grow/grow