* arts-2-1-445

	* src/partition_function_data.cc: Replaced infunctional data: O and He
	were constant -1, which triggers a runtime error. CH3OH was constant 0,
	which would have caused an uncaught bug (division by 0) if ever used.
	For CH3OH and O TIPS provides constant 0, which is rubbish. Replaced
	those by JPL data instead. He set to constant 1.

	* src/absorption.h (CalculatePartitionFctRatio):
	Make sure qtemp==0 throws a runtime error, too, avoiding div0.

	* 3rdparty/partFct/partition_functions.py:
	Added functionality for deriving partition function coefficients from
	JPL for CH3OH and O.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8115 aaf1aab0-4228-0410-ad68-8dceda47f409