KNIFE-270: KNIFE-276: KNIFE-249: Spaces in TEMP, Nested attributes, 32/64 mismatch with FreeSshD

KNIFE-249: Bootstrap Windows Returns 404 on chef-client.msi download (bad url in REMOTE_SOURCE_MSI_URL)
KNIFE-270: knife bootstrap ssh" for a windows node fails when TEMP directory has spaces
KNIFE-276: winrm should support nested attributes