OC-4739: OC-4748: Create powershell and batch providers in core Chef
OC-4739: OC-4748: Refactor tests to share examples across batch and powershell resource specs
Adding missing shared examples for execute, script, and windows scripts
OC-4739: Merge functional tests, Win2k3 compatibility
OC-6037: Refactor tests to avoid side-effects on other tests
Stop sharing examples across script interpreters
Merge pull request #646 from opscode/chef-oc-4739-rebase

Addition of Batch and Powershell resources for Windows