[RFC PATCH] Add option to print the first line of an entry

[Greg Minshall]

Rene,

> The idea is to make piping the password as easy as copying it to the
> clipboard. IMHO this should be a feature of pass.

easy is good!  here is how i, at least, use `pass tail` (*):

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bash wonderful (master): {316} pass tail foo/bar
username: everyone at example.com
bash wonderful (master): {317} 
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on the question of whether this is easier, harder, i am neutral!

cheers, Greg

(*) once i have it installed, e.g., in
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/usr/local/lib/password-store/extensions/tail.bash
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