Added GetFile interface

[kontza]

Hi,

With access to the underlying file object, we can construct bufio's readers, writers and scanners.

Cheers, Juha

[tarm]

bufio takes an io.Reader interface (not an os.File) and so should already be compatible with serial.Port.

Why does that not work for you and why do you need to have the os.File instead?

[kontza]

Ignorance on my part. It hadn't occur to me to check the bufio API deep enough, to notice that indeed io.Reader, not an os.File is the input to making a new Reader.

Not much point in this GetFile()-function there.

Thanks for pointing that out.