cmd usage:
python CTL_conventool.py [-o -–orien ‘s2t’|’t2s’] [-e -–excel file] [-t –-txt file] [-d --debug]
	-o –orien choices=['s2t', 't2s'], s2t for excel to txt, or t2s for txt to excel’
	--excel, -e excel file name
‘	--txt, -t : TXT file name
	--debug –d:  set debug level as least and save it to log.txt

Script will mapping CTL & SAR value in BDF to excel with MSFT format, or reverse.
a new file named prefix with "NEW" will created.
logs will saved in [running location]/logs/log.txt
