new formula: onetime

New formula: onetime. Assists users in creating one-time pads. Still
actively supported upstream, and has gathered a lot of renewed interest
thanks to Hak5 covering the tool recently.
new formula: onetime

Uploaded the wrong file (I uploaded my last tweaked version, rather
than my final completed version). This version is the right one, and
irons out the last couple of syntax bugs.
new formula: onetime

Thanks to Mike for the ton & a half of help in tidying up various bits
& pieces of syntax.

This commit standardises the double quotes, switches back to sha1,
removes the python dependency because the system python is fine for
this formula, inserts a comment explaining the inreplace & upstream
report, slims down the installation process & adds a provisional test,
which I hope to improve in a later final commit.
new formula: onetime

sha1 fix for devel.
onetime: add 1.81 bottle.