Retain both internal and miner ct.'s
Query user for dew point  and set RIC accordingly
Added condition(), variable()
pyrun() now checks for non-zero exit status and sends email/alert if failure
Added logging to PTC programs
ptcrun: check if program running is the one requested (in case another pgm was already running)
Catch and log exceptions while opening serial port
Use BT371 (B suffix) as reference
Slight change in ligsave dilution, volume of PCR product saved
Turn on PTC debugging (logged)