StreamSpecification

Various options to redirect streams.

Union Cases

Union Case	Description
`CreatePipe(StreamRef)` Signature: StreamRef	Retrieve the raw pipe from the process (the StreamRef is set with a stream you can write into for 'stdin' and read from for 'stdout' and 'stderr')
`Inherit` Signature:	Do not redirect, or use normal process inheritance
`UseStream(closeOnExit,stream)` Signature: bool * Stream	Redirect to the given stream (the stream is provided by the user and is written only for 'stdout' & 'stderr' and read only for 'stdin')