The ohai and facter modules use /usr/bin/logger to log the fact that
they have been invoked.  I added 'import os' to the ping module
so that it could have the same syslog statements as the other modules.
I separated the condensed:
    shlex.split(open(argfile, 'r').read())
into two separate statements similar to the other modules.

already exists

Fix async to use the new argfiles method (wrapping brain around rock, really must write module development guide)

may forget about -a.  The CLI already warns about no host pattern by pulling up usage.

Cleanup is due in runner.py

CentOS5 has python 2.4 which doesn't have a built-in json
module