Be a hero- update Binscii

[sjensen@cello.gina.calstate.edu (Steve Jensen)]

I'm giving a presentation on using Binscii and Shrinkit to the
newbie sig of my user group in a couple weeks.  Anybody feel
like improving Binscii's user interface?  I'm referring to typing
in the prefix and pathname.

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                        | sjensen@qnis.net                |
                        | sjensen@cello.gina.calstate.edu |
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