Required syntax changes to support ruby version 1.9

"case" syntax changes and using "node.set[]=" instead of "node[]="
Added filter for operations not supported on windows.

Crowbar-hacks does not work on Windows platform.
Ohai plugins location is different on Windows.
Fixed a typo in the plugin_path for windows.
Merge pull request #139 from ociuhandu/pull-req-release-pebbles-master-58a2078e8676eb14d4439f36e1ad3e1385f0a21b

https://github.com/crowbar/barclamp-deployer/pull/139

Merged by devtool for VictorLowther