Recursive upload of directories
Added winrm file manager

Guest file manager handles upload and download of file between host and guest.
Extract guest_file_path method
Added configurable WINRM_PORT enn var for integration specs
Fixed recursive directory uploads and added integration test
Added note for 1.7 plugin release
Re-added upload/download methods to winrmshell
Remove puts from test
Merge pull request #186 from WinRb/upload-entire-directories-recursively

Upload entire directories recursively