slack 0.15.0

[Alan Sundell]

I rolled a new release of slack (version 0.15.0). And it's only been
a little over a year... Get it at the usual place:
http://www.sundell.net/~alan/projects/slack/

This version adds three new options (--sleep, --rsh, --version).
It also fixes a few bugs, mostly in installs/packaging, but it
includes a fix for a rare problem in slack-stage.
See the ChangeLog for all the details and credits.

Thanks to everyone who sent me patches! Sorry to take so long to
incorporate them in a new release.

--Alan