name hypercharge gauge coupling as gY in the SLHA output

This will avoid confusion, because in most SARAH model files the
hypercharge coupling is named as g1, which is usually the GUT
normalized one.
moving run_softsusy.x to models/SoftsusyMSSM/
moving run_softpoint.x to models/SoftsusyNMSSM

This is now consistent with all the other model directories, which
also contain their executables.  Furthermore it reflects the
dependency on SoftsusyMSSM and SoftsusyNMSSM.
integrate slhaea.h from upstream
setting FLIBS for intel's ifort compiler
set dependency generators separately from compilers
nice indentation of makefile variable setting
Merge branch 'development' into feature-higgs-two-loop