removed various redundant maintainer variables from debian/rules
* Apply patches from Debian:
 - Rename wmShutdown.* -> wmshutdown.*.
 - Rename shutdown.c -> wmshutdown-run.c.
 - Various other bugfixes.
* Convert to GTK3.
Convert build process to autotools.
Remove unused wmShutdown.h.
Add .gitignore.
Add manpages from Debian.
Add install-exec-hook to set permissions.
Update docs for new version.
Merge branch 'upstream'
Remove debian/clean; make clean now works properly.
Remove manpage-related files from debian directory; now included upstream.
Remove debian/dirs; directories now created by make install.
Delete debian/patches and update Homepage field in debian/control.
dh_fixperms excludes wmshutdown-run