Address [KNIFE-22] by using em-winrs to be-able bootstrap from a Windows Workstation

em-winrs : http://github.com/chirag-jog/em-winrs is a event-machine based wrapper around the WinRS utility. The pull request is to use em-winrs to bootstrap windows machines while running on a Windows Client. The winrm utility does not support the Kerberos protocol while running on Windows.