[Parallelism] Added multithreading for uploads

This improvement will let the file transfer for WinRM works in
parallelism. You can configure the amount of parallel files to upload
with the attribute :max_threads.
Enabled Busser with Transport shell logic.

Added default_port and default max_threads parameters.
Modified chef_omnibus functions with a nice progress bar.
Deleted old winrm.rb and winrm_base.rb from project.