New starting point for ThermoSysPro development

Main modifications:

• Correct the h2o concentration bug
  • No start value for Xh2o variable
  • Xh2o=0 in sources or in component with initial composition (if dynamic_composition_balance=true)
  • Set Xh2o=0 (instead of 1) for some specific diphasic WaterSteam modules (WaterSteam → no FlueGases concentration), expecially the Condensers:
    • ThermoSysPro/Fluid/HeatExchangers/SimpleDynamicCondenser.mo
    • ThermoSysPro/Fluid/HeatExchangers/DynamicCondenser.mo
    • ThermoSysPro/Fluid/HeatExchangers/StaticAerocondenser.mo
    • ThermoSysPro/Fluid/HeatExchangers/StaticCondenser.mo
    • ThermoSysPro/Fluid/HeatExchangers/StaticCondenserHEI.mo
    • ThermoSysPro/Fluid/Volumes/DynamicDrum.mo
    • ThermoSysPro/Fluid/Volumes/Pressurizer.mo
    • ThermoSysPro/Fluid/Volumes/TwoPhaseCavity.mo
    • ThermoSysPro/Fluid/Volumes/TwoPhaseCavityOnePipe.mo
    • ThermoSysPro/Fluid/Volumes/TwoPhaseVolume.mo
  • New start values to init ThermoSysPro/Fluid/Examples/CombinedCyclePowerPlant/CombinedCycle_Load_100_50.mo
• Add the NuclearCore package
• In the I&C package:
  • Add an ThermoSysPro/InstrumentationAndControl/Blocks/NonLineaire/Hysteresis.momodule and the relative example (ThermoSysPro/Examples/SimpleExamples/TestHysteresis.mo)
  • Add a Boolean to Real converter: ThermoSysPro/InstrumentationAndControl/Blocks/Math/BooleanToReal.mo
• Modification of ntubes from Integer to Real (for equivalent geometries) in:
  • ThermoSysPro/Fluid/PressureLosses/LumpedStraightPipe.mo
  • ThermoSysPro/WaterSteam/HeatExchangers/DynamicOnePhaseFlowPipe.mo
  • ThermoSysPro/WaterSteam/PressureLosses/LumpedStraightPipe.mo
• Add a pressure output signal in the pressurizer (ThermoSysPro/WaterSteam/Volumes/Pressurizer.mo)