Update Invoke-TokenManipulation.ps1

PassThru argument for passing newly created System.Diagnostics.Process object to pipeline added
Update Invoke-TokenManipulation.ps1

Added example of using -PassThru.
Only attempts to pass System.Diagnostics.Process object if successfully created.
On -PassThru, caches process handle in order to be able to retrieve process info (such as .ExitCode) after process ends.
Update Invoke-TokenManipulation.ps1

Removed global: in function definition.
Update Invoke-TokenManipulation.ps1

Fixed example; "-PassThru" was missing
Merge pull request #2 from rmariboe/patch-1

Update Invoke-TokenManipulation.ps1. Thanks for the contribution rmariboe!