#795 fixed (Physical types in Modelica.SIunits should not have start, min, or max values):

Basically, most of the changes performed by Francesco in r4446 according to ticket #487 are undone:

- Density            (min=0; removed max)
- RelativeDensity    (min=0)
- SpecificVolume     (min=0, removed max)
- Pressure           (nominal=1e5, removed min, max, start)
- AbsolutePressure   (min=0.0, removed max)
- PressureDifference (removed min, max)
- ThermodynamicTemperature (min = 0.0, start = 288.15, nominal = 300, removed max)
  // start-value was already present in MSL3.2
- TemperatureDiffference (removed min, max, nominal, start, displayUnit)
  // displayUnit="K" does not make sense, since unit="K"
- SpecificEntropy (removed nominal=1000, since meaningful nominal value
                   depends on offset and medium)
- SpecificEnergy  (removed nominal=1e6, since meaningful nominal value
                   depends on offset and medium)
- StaticPressure = AbsolutePressure
  // was defind in MSL3.2 as AbsolutePressure
  // In trunk it was set to "Pressure", but this is wrong, since StaticPressure
  // is an AbsolutePressure
- MassFraction (min=0, max=1, removed nominal and start)
- MoleFraction (min=0, max=1, removed nominal and start)
- PartialPressure = AbsolutePressure
  // This was wrongly changed in MSL trunk to "PartialPressure=Pressure"
  // Note, PartialPressure is a just a special absolute pressure
- Moved package SIunits.Icons after SIunits.UsersGuide

git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@5855 7ce873d0-865f-4ce7-a662-4bb36ea78beb