* win_exec: refactor PS exec runner
* more changes for PSCore compatibility
* made some changes based on the recent review
* split up module exec scripts for smaller payload
* removed C# module support to focus on just error msg improvement
* cleaned up c# test classifier code
* windows: add #AnsibleRequires to set whether a module requires module or a specific version
* fix up pep8 issues
* changed psversion to use the actual ps Requires -Version syntax
* missed the check on #Requires -Version
* fix #Requires module extensions