add a conversion class for datetime and time stamps, since I need this all the time.

'Created' value in mailer.py is causing problems for PLE
move print statements to stderr in plccache.py and comon.py
add an 'escapeName' routine in dbpickle to allow filepaths in output names
fix bug in scanapi that missed debug node if there was no bootmanager.log
add checks for yum.config files