* arts-2-1-727

General: Zeeman now runs for NO2 and HO2.

* src/m_zeeman.cc: Removed S>0, since Sigma may be less than zero.

* src/linerecord.cc: Added reading for NO2 and HO2 quantum numbers.

* controlfiles/testdata/isoquantum.xml: Added NO2 and HO2 to the Zeeman
species in this file. WARNING: the g_s is for a free electron assumption
and I have no idea how good that assumption is for these molecules.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8585 aaf1aab0-4228-0410-ad68-8dceda47f409