Arts-2-1-674

* src/wigner_functions.{cc,h}: Preparation for ECS line-mixing. Mathematical
functions that calculate the wigner 3j and 6j functions. Not yet in use.

* doc/uguide/absorption.tex: Some comments on how to use line-mixing.

* src/absorption.{cc,h}: Changes in 2nd order line mixing routine to allow
more pressure levels necessary for abs_lookup. Also, small changes in {h}
for implementing different Q(T) calculations soon.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8497 aaf1aab0-4228-0410-ad68-8dceda47f409
2013-06-18  Patrick Eriksson  <patrick.eriksson@chalmers.se>

            * arts-2-1-675

            * controlfiles/artscomponents/radiolink/TestRadioLink2.arts:
            Removed old incorrect comment.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8500 aaf1aab0-4228-0410-ad68-8dceda47f409
* arts-2-1-676

* src/xml_io.cc (xml_open_output_file, xml_read_from_file):

Properly handle filenames that are 3 characters or less.

* doc/uguide/Figs/abs/{abs_lookupCalc.pdf,abs_xsec_agenda.pdf,
propmat_clearsky_agenda.pdf,propmat_clearsky_agenda_detail.pdf},
doc/uguide/absorption.tex:

Add some absorbing flow charts.

git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8501 aaf1aab0-4228-0410-ad68-8dceda47f409