2013-09-04  Johan Strandgren  <johsat-9@student.ltu.se>

	* arts-2-1-754

	* src/optproperties.h (ScatteringMetaData):
	Changed complex_refr_index from being a Tensor3 to a Griddedfield3

	* src/m_cloudbox.cc (pnd_fieldSetup):
	* src/cloudbox.cc (pnd_fieldH13, IWCtopnd_H13, scale_H13):
	* src/cloudbox.h (pnd_fieldH13, IWCtopnd_H13, void scale_H13):
	Added the updated version of Heymsfield's PSD from 2013. Very
	similar to the earlier version (H11), only updated variable values.
	
	* src/methods.cc (complex_refr_indexRegrid): Removed this WSM 
	used for interpolation of the refractive index.

	* src/m_tmatrix.cc
	(complex_refr_indexRegrid): Deleted and replaced with a built-in
	interpolation function inside scat_data_arrayFromMeta instead (see below).
	(scat_meta_arrayAddTmatrix): removed check-function for refractive index.
	Simplified and clarified the equation used for calculation of diameter_max.
	(scat_data_arrayFromMeta): Added a built-in interpolation function that 
	interpolates the refractive index to fit the frequency and temperature grids
	chosen for the T-matrix calculations.


git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8631 aaf1aab0-4228-0410-ad68-8dceda47f409