Bugfix: There was an inconsistency in the FlexibleSUSY model files (which
was copied from the SPheno model files): The GUT condition was formulated
in terms of *normalized couplings*, but the low-energy constraints were
formulated in terms of *unnormalized couplings*.  Now everything is
written in terms of *normalized couplings*.
Testing the running vev at the low scale.  The difference of 0.7% comes
from the difference of the gauge couplings, which lead to different
Z self-energies, which leads to a different 1-loop Z mass.