add test for delta_alpha_i in the NMSSM
increase the test precsion for delta_alpha_i in the MSSM
add test for the SM pole masses in the NMSSM low-scale constraint
apply NMSSM low-scale constraint and compare the gauge couplings
compare the Yukawa couplings in the low-scale constraint in the NMSSM
increase the test precision in the MSSM low-scale constraint
merge softpoint.cpp from upstream/nmssm2
add MODSEL blocks to the SLHA input files to make run_softpoint.x work