* arts-2-1-463

	* src/cia.{h,cc}: Introduced robust option for CIA extraction. If
	set to 1, then being outside the temperature range of the data
	will not give a runtime error, only return NAN. The default is 0,
	which means that there will be a runtime error.

        * src/m_cia.cc: Ditto.

        * src/test_cia.cc: Adapted to robust option.

        * src/methods.cc (abs_xsec_per_speciesAddCIA): Added the robust option.

        * src/m_basic_types.h (nelemGet): Implemented for group ArrayOfArrayOfSpeciesTag.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8134 aaf1aab0-4228-0410-ad68-8dceda47f409