* arts-2-1-701

* src/tmatrix.{cc,h}: Add checks for ref index size.

* src/xml_io_compound_types.cc: Fix typo.

* src/wigner_functions.cc (wigner3j):

Add braces for outer if to avoid confusion where the inner else belongs
to.

(wigner9j): Return NAN to avoid warning.

* src/test_matpack (test45): Use explicit cast to avoid warning.

git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8544 aaf1aab0-4228-0410-ad68-8dceda47f409
* arts-2-1-702

* doc/uguid/absorption.tex:  Zeeman is now a subsection of "Calculating gas 
absorption". This fix why line mixing was considered a subsection of Zeeman.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8545 aaf1aab0-4228-0410-ad68-8dceda47f409
* arts-2-1-703

* src/m_tmatrix.cc, src/methods.cc:

(single_scattering_dataCalcTMatrixTest): Add WSM that takes all
parameters needed for Tmatrix calculations as input for easier testing.

* src/tmatrix.{cc,h}:
(calcSingleScatteringDataProperties): Don't pass ConstMatrixView as
reference.

* controlfiles/artscomponents/tmatrix/TestTMatrixSSD.arts:

Add simple test case to calculate single_scattering_data for given
parameters and save it to a file.

* controlfiles/CMakeLists.txt: Add TestTMatrixSSD.arts.

git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8546 aaf1aab0-4228-0410-ad68-8dceda47f409