[IIS] Support for Virtual Directory resource

As an IIS Administrator
I want define a puppet resource with the following features

• Create a Virtual Directory Resource
• Remove a Virtual Directory resource
• Update a Virtual Directory Resource
• Get all Virtual Directory Resources
• Convert IIS virtual directory to an IIS Web Application

So that I can manage an IIS virtual directory with Puppet.

The following paramters/properties will be implemented:

Website
WebApplication
Name
PhysicalPath

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The working assumption is that the IIS Module will be built off of the IIS Cmdlets.

Features to be implemented are:

• Create
• Remove
• Get
• Convert IIS virtual directory to an IIS Web Application

The following Cmdlets may be implemented for this feature:
Get-WebVirtualDirectory
New-WebVirtualDirectory
Remove-WebVirtualDirectory
ConvertTo-WebApplication