Powerview : Add Get-NetComputerStartTime & Get-NetComputerVersion

[RemiEscourrou]

Hi,

This PR is for a Get-NetComputerStartTime function which uses Netapi32 to retrieve the boot time from the remote server.

This function just need domain authenticated user access.

Example

PS C:\> Get-NetComputerStartTime -ComputerName sqlserver

HostName      StartTime
--------      ---------
sqlserver     18/07/2017 06:03:27

This PR is also for a Get-NetComputerVersion function which uses Netapi32 to retrieve information
concerning the operating system from the remote server because we can't always trust information
in Active Directory.

This function could be use with Anonymous access (if the EveryoneIncludesAnonymous policy
setting allows anonymous access).

Example

PS C:\> Get-NetComputerVersion -ComputerName sqlserver

wki100_platform_id  : 500
wki100_computername : sqlserver
wki100_langroup     : TESTLAB
wki100_ver_major    : 10
wki100_ver_minor    : 0

[HarmJ0y]

Sorry it took so long to get to this- there are some conflicts with the branch that I'll need to resolve first, but this functionality looks awesome!

[RemiEscourrou]

No problem, I will resubmit the request without conflicts