Make all Pendulum LOG INFO calls into NOTICE

When we're logging information about what cogd is doing, that should be
done at NOTICE level, since INFO is a bit too verbose for normal logging
scenarios.
Symlink support

The new `symlink' resource allows management of symbolic links (presence
/ absence and target).
Killswitch Support

cogd now supports a killswitch file, $lockdir/cfm.KILLSWITCH, that will
prevent any cogd configuration management run from kicking off, whether
it was a scheduled run under the daemonized process, or a one-off run
from a user.  This allows sysadmins to properly block Clockwork
temporarily, without having to shut down cogd.
Support 'version: "any"' in res_package

This is the new default behavior for an unspecified version; install the
package if it isn't already installed, and leave it alone if it is.
This differs from "latest" in that the latter keeps upgrading to stay
abreast of newer versions.
Fix Early Restart contention

If cogd updates itself, it should gracefully restart at the end, when
all other work has been done.  This is accomplished through a new file,
/var/lock/cogd/.needs-restart, that cogd pendulum code picks up on as
needing to force a restart.
v2.0.14