New Feature: Invoke-SessionCommand #652

A command that provides a uniform abstraction layer to remote invocation, that will never throw an exception and instead return a uniformly shaped object:

• ComputerName
• Success: Any error happened?
• Error: Any error that happened
• Data: The results returned

Additionally, in managed sessions:

• SessionID
• Messages: The messages sent to a PSFramework message proxy
• Session: A reference to the Managed Session Object