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
adding missing intel fortran libraries for run_softpoint.x
update README

Since SARAH 4.0.4 the user can simply put the SARAH model files into
FlexibleSUSY/sarah/
write more system and build information into config.h
print build information on demand
store info about low-energy model in model info module
add helper function to print model information
remove dependency on config.h

This reduces compilation time if ./configure is run again.
remove -frecursive from default FFLAGS

It is not needed because there are no recursive Fortran functions.
Merge branch 'development' into feature-tower
config/Makefile.tower.in: adapt to commit 86a907
Adapt test suite to commits 855efb 3e17cb
Suppress a warning in tower example