* arts-2-1-595

* src/m_linemixing.cc, src/methods.cc, src/workspace.cc:

line_mixing_o2 -> line_mixing_data.
line_mixing_o2_lut ->line_mixing_data_lut
line_mixing_o2Read -> line_mixing_dataRead
line_mixing_o2Init -> line_mixing_dataInit

Change type of l_m_d to ArrayOfArrayOfVector. This way it can hold all
the line mixing data for all species.

Add argument species_tag to line_mixing_dataRead to specify to which
abs_species this line mixing data should be attached to.

* src/absorption.cc (find_matching_lines):

If isotopologue index equals the total number of isotopologues in that
species, it is also treated as a wildcard. Consistent with the
behavior of SpeciesTag.

* src/abs_species_tags.h (get_tagindex_for_Strings):

Removed. Unused, no implementation present.

* src/test_quantum.cc: Updated.

git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8368 aaf1aab0-4228-0410-ad68-8dceda47f409