Done Allow PowerShell 5.1 to catch PShell helper command exceptions

[Joe Caverly]

The following helper function/alias for PShell do not throw an execption on an error.

• Invoke-TccCommand / tcc
• Expand-TccValue / tccx
• Get-TccVariable / tccvar

I can create PowerShell 5.1 wrapper functions for each of these to throw an exception on an error,
but it seems more logical to have the helper function/alias throw the exception on an error from TCC (TC-PowerShellHost64.dll),
so that the exception can be caught from PowerShell 5.1

Joe