Now PowerShell cmdlets for System Center Configuration Manager will be released as separate module, which will be updated regularly, and will not be a part of cumulative updates.
The first version of the Cmdlet Library you can download here, and here you will find the documentation.
Requirements for the System Center Configuration Manager Cmdlet Library:
- PowerShell 3.0 or higher;
- The Configuration Manager administration console from System Center 2012 Configuration Manager SP2/R2.