DAQmx: Allow stacking of multiple scales

[TCPlomp]

We normally have a DAQ system consisting of several elements:

-Sensor

-Custom filtering/attenuation

-Signal conditioning

-NI-DAQ device

When we use scales in DAQmx we have to create a scale for every 'route' we use (sometimes we have to use a 4 kAmps sensor for a 100 amps signal).

If we could define a scale in a task consisting of multiple scales, we could directly pick the sensor and signal conditioning we use for each signal. A change in one of these elements could easily be adjusted.

Ton