Add Documentation for Auto-documenting/Wiki Resource Module Structure

[PlagueHO]

There are now several resource modules that have moved over to using @BrianFarnhill 's auto documentation/wiki generation structure. These modules are SharePointDsc, xNetworking, xStorage and xDFS (with xCertificate being moved). The repo structure and files in the modules are slightly different to the standard module and so we should provide documentation on how this structure differs.

This was raised in this issue: #278

[johlju]

Maybe we should hold off on this until we see if issue PowerShell/DscResource.Tests#225 can be a reality or not?

[PlagueHO]

Agreed - hopefully we can find a way to standardize. I just keep running out of time 😢

[johlju]

Yes me too... Looking into automating labels between reviews and closing issues. 🙂