Change Pressure Unit to hPa

Hectopascal is identical to millibar, but Pascal is the SI unit, so we
go with it...

src/experimentstate.h

@@ -52,14 +52,14 @@ public:
 
     static const constexpr uint16_t NumberOfAdcChannels = 4096;
 
-    using PressureMillibar = UInt32BoundedDouble<0, 1500>;
+    using PressureHectoPascal = UInt32BoundedDouble<0, 1500>;
     using TargetPositionMilliMeter = UInt32BoundedDouble<14, 200>;
     using AdcConversion = GenericBoundedNumeral<uint16_t, uint16_t, 0, NumberOfAdcChannels - 1>;
 
     uint64_t id = 0;
     AdcState adcState = AdcState::Stopped;
     BeamHoleState beamHoleState = BeamHoleState::Closed;
-    PressureMillibar pressure = PressureMillibar::minimum ;
+    PressureHectoPascal pressure = PressureHectoPascal::minimum ;
     TargetPositionMilliMeter targetPosition = TargetPositionMilliMeter::minimum;
     AdcConversion adcThreshold = AdcConversion::minimum;