Move sm to /usr/bin and manpage to section 1

Josh Triplettrequested to merge
josh/sm:not-a-game into master

sm is a generally useful tool, not a game.

The first commit adjusts the human-editable files; the second commit updates the autotools-generated files via autoreconf -vfi.

I've built and tested the resulting package.

This fixes https://bugs.debian.org/1037113 .

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