+ This disambuguates calls to the Hyper-V functions for the Hyper-V provider.
The ambiguity of some commands - such as `Get-VM` - causes the Hyper-V provider
to fail on systems where VMware PowerCLI is installed. This change ensures that
all calls to Hyper-V specific cmdlets or functions are prepended by `Hyper-V\`.
This ensures the correct cmdlet calls are being made.
+ Resolves #8862.
Implemented the differencing disk for vmcx.
This means the disk is now copied by Hyper-V (Powershell) instead of Ruby for new machines.
This does mean EFI Firmware now does work for machines since it is quite a feep copy. Compare-VM will report incompatibilities should they be found.