clean up os.sep/altsep refs

git-svn-id: svn://fountainhead.talkpoint.com/nori/trunk@13337 940247f8-a3eb-dc11-81c7-0019d144f6e4
don't print messages about log rotation if it's not going to be done and it's not visible in the options list

git-svn-id: svn://fountainhead.talkpoint.com/nori/trunk@13338 940247f8-a3eb-dc11-81c7-0019d144f6e4
return thread as well as popen from run_command(), run_with_logging()

git-svn-id: svn://fountainhead.talkpoint.com/nori/trunk@13339 940247f8-a3eb-dc11-81c7-0019d144f6e4
changes to run_with_logging: add print_output, output_logger, output_log_fo parameters

git-svn-id: svn://fountainhead.talkpoint.com/nori/trunk@13340 940247f8-a3eb-dc11-81c7-0019d144f6e4