* arts-2-1-448

* src/doit.{cc,h} (doit_scat_fieldNormalize):

New function to scale doit_scat_field with correction factor
derived from difference between

* src/methods.cc, src/m_doit.cc (doit_i_fieldUpdateSeq1D):

Add parameters scat_aa_grid, normalize and norm_error_threshold.
Make doit_scat_field input and output.

Call doit_scat_fieldNormalize if turned on.

(doit_i_fieldUpdate1D, doit_i_fieldUpdateSeq1DPP):

Set doit_i_field also as input.

* src/doit.{cc,h} (doit_scat_fieldNormalize):

Add new function for calculate the scattered extinction field
and apply correction factor to doit_scat_field.

* controlfiles/artscomponents/doit/TestDOIT.arts:

Turn on new normalization in doit_i_fieldUpdateSeq1D.

* controlfiles/general/agendasDOIT.arts:

Add comment with example code to turn on new normalization in
DOIT.

* src/workspace.cc: Fix typo.

* README: Add missing =1.

git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8119 aaf1aab0-4228-0410-ad68-8dceda47f409
* arts-2-1-449

* ChangeLog: Part of a sentence got lost.

git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8120 aaf1aab0-4228-0410-ad68-8dceda47f409