Add bath temperature to feedback. Allow switching between reading the
bath or external sensor for the sensor value. Check the data type of
replies from the Julabo because it can return values like "___.__" if
you're reading the wrong sensor.
sct_lakeshore_340.tcl, sct_lakeshore_336.tcl
Use the tolerance set on the control/tolerance node so the user can
change it while running.
r3348 | ffr | 2012-01-20 15:25:46 +1100 (Fri, 20 Jan 2012) | 10 lines