calc_S_sza.py for error calculation of pointing
adjustements and bugfixes else

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# Committer: mathias <mathias@mini-mp.uni-bremen.de>
#
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   AVK.py
#	modified:   calc_S.py
#	new file:   calc_S_sza.py
#	modified:   sfit4_ctl.py
#	new file:   spectrum.py
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	AVK.pyc
#	AVK.py~
#	calc_S.py~
#	calc_S_sza.py~
#	detfile.pyc
#	plot_result.py~
#	read_Kout.pyc
#	read_Kout.py~
#	read_ak.pyc
#	read_from_file.pyc
#	read_hdf.pyc
#	read_misc.pyc
#	read_pbpfile.pyc
#	read_profile.pyc
#	read_reference_prf.py
#	read_reference_prf.pyc
#	read_reference_prf.py~
#	read_sfit4.pyc
#	read_sfit4_ctl.py
#	read_sfit4_ctl.py~
#	read_statevec.pyc
#	reference_prf.pyc
#	reference_prf.py~
#	sfit4_ctl.pyc
#	sfit4_ctl.py~
#	spectrum.pyc
#	spectrum.py~
#	split_reference_prf.py
