* arts-2-1-700

	* src/methods.cc
	(propmat_clearskyAddParticles, propmat_clearskyAddFaraday):
	Added description.

	(propmat_clearskyAddZeeman, ParticleType2abs_speciesAdd,
	basics_checkedCalc):
	Spell fixed, more internal links, little rewording.

	* src/m_abs.cc (propmat_clearskyAddParticles, propmat_clearskyAddFaraday):
	Catch case of rtp_los not specified (happened when methods get called
	from propmat_clearsky_fieldCalc).

	* src/m_abs_lookup.cc (propmat_clearsky_fieldCalc): Temporary(?) bugfix.
	Do NOT require all 3 magfield components to be explicitly specified, but
	allow implicit zero-setting for separate components. This particularly
	circumvents silently ignoring magfield as happened with previous version.

	* doc/uguide/refr_index.tex: Added internal reference to Faraday section.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8542 aaf1aab0-4228-0410-ad68-8dceda47f409