merged latest pyicon release into branch

config_ckdtree/config_ckdtree_europe011_dwd.py

doc/installation.rst

doc/pyicon-core.rst

doc/pyicon-quickplots.rst

doc/quickstart.rst

pyicon/params_default.json

pyicon/pyicon_IconData.py

pyicon/pyicon_accessor.py

pyicon/pyicon_calc_xr.py

pyicon/pyicon_plotting.py

pyicon/pyicon_tb.py

pyicon/quickplots/pyicon_quickplots.py

pyicon/quickplots/qp_compare_atm_dwd.py

pyicon/quickplots/qp_driver.py

pyicon/tests/test_pyicon_calc_xr.py

tools/prep_era5_pyicon_lam_interpnd.py

tools/pyic_fig.py

tools/run_qp_compare_atm_clm.sh

tools/run_qp_compare_atm_dwd.sh

tools/run_qp_driver_atm_clm.sh