do not try to execute the output of nmProcessSpec
change input scale of kappa

Per default we input kappa at the GUT scale (SLHA standard).  By
setting

  BLOCK QEXTPAR
     62   -1                   # input kappa at Msusy

the user can set the input scale for kappa to be M_susy
input Svev at Msusy (instead of MZ)

This is better complies to SLHA and is what NMSSMTools does.
kappa must be set if !Z3 or SoftHiggsOut
use -O2 by default, because -O3 is unstable on some machines
adding GUT flags for <S>, xiF and mu'

Per default we input <S>, xiF and mu' at the GUT scale (SLHA std.).
If these parameters should be set at Msusy, one can set the following
entries in the QEXTPAR block:

  Block QEXTPAR
     65   -1                   # input lambda * <S> at Msusy
     66   -1                   # input xi_F at Msusy
     68   -1                   # input mu' at Msusy
Major overhaul of VhAtMin() in nmssmsoftsusy.cpp to take into account different
scenarios of vanishing vevs.  Tested against CHECKMIN() routine
of NmssmTools.  Code compiles and produces empty diff against SLHA2
inputs from commit 7bd3...
Moved call to VhAtMin() from end of rewsb() to end of lowOrg().  Called at SUSY
scale, just before run down to MZ.  Empty diffs against commit
7bd3...
Changed VhAtMin() to now take soft masses mHu2, mHd2, mSsq as inputs.  Makes
more sense for EWSB requirements on potentials V1 and V2
Set potentials V1 and V2 to zero if no EWSB possible
Moved VhAtMin() to be after physical(3) in lowOrg().  Output unchanged