Solved issue #19 and additional minor change

1. Issue #19 solved: correct reference of dynamic ventilation
2. Changed the initialisation of LimPID in AixLib.Utilities:control.PITemp to
be compatible with the new initialisation from Modelica.Blocks.Continuous.LIMPID
3. Corrected name of AixLib.Building.HighOrder.House.OFD_MiddleInnerLoadWall.BuildingEnvelope.UpperFloorBuildingEnvelope