Created Unassigned: SP2013 with SP1 prerequisite offline installation [20807]

New installation of SP2013 with SP1 (using integrated media/ISO) needs the prerequisite file WCFDataServices 5.6.0 along with the 5.0.
An additional argument ("WCFDataServices56") should be specified for the PrerequisiteInstaller.exe in the "InstallPrerequisites" function.

example:
```
Start-Process "$env:SPbits\PrerequisiteInstaller.exe" -ArgumentList "/unattended `
/SQLNCli:`"$env:SPbits\PrerequisiteInstallerFiles\sqlncli.msi`" `
/PowerShell:`"$env:SPbits\PrerequisiteInstallerFiles\Windows6.1-KB2506143-x64.msu`" `
/NETFX:`"$env:SPbits\PrerequisiteInstallerFiles\dotNetFx45_Full_x86_x64.exe`" `
/IDFX:`"$env:SPbits\PrerequisiteInstallerFiles\Windows6.1-KB974405-x64.msu`" `
/IDFX11:`"$env:SPbits\PrerequisiteInstallerFiles\MicrosoftIdentityExtensions-64.msi`" `
/Sync:`"$env:SPbits\PrerequisiteInstallerFiles\Synchronization.msi`" `
/AppFabric:`"$env:SPbits\PrerequisiteInstallerFiles\WindowsServerAppFabricSetup_x64.exe`" `
/KB2671763:`"$env:SPbits\PrerequisiteInstallerFiles\AppFabric1.1-RTM-KB2671763-x64-ENU.exe`" `
/MSIPCClient:`"$env:SPbits\PrerequisiteInstallerFiles\setup_msipc_x64.msi`" `
/WCFDataServices:`"$env:SPbits\PrerequisiteInstallerFiles\WcfDataServices.exe`" `
/WCFDataServices56:`"$env:SPbits\PrerequisiteInstallerFiles\WcfDataServices56.exe`""
```