Update Quick-Start-Linux-Mac.md
Update Quick-Start-Linux-Mac.md

Credential configuration belongs in install dir, not config dir
uva-its/gopherbot,parsley42/gopherbot,uva-its/gopherbot,uva-its/gopherbot,parsley42/gopherbot,uva-its/gopherbot,parsley42/gopherbot,parsley42/gopherbot