Merge branch 'python3' into 'devel'

examples/config_dummy_adjtltest.yml

examples/config_dummy_forward.yml

pycif/plugins/domains/dummy/read_domain.py

pycif/plugins/fluxes/chimere/read.py

pycif/plugins/fluxes/dummy_txt/__init__.py

pycif/plugins/fluxes/dummy_txt/fetch.py

pycif/plugins/fluxes/dummy_txt/make.py

pycif/plugins/fluxes/dummy_txt/read.py

pycif/plugins/fluxes/dummy_txt/write.py

pycif/plugins/fluxes/edgar_v5/read.py

pycif/plugins/measurements/random/__init__.py

pycif/plugins/meteos/dummy_csv/__init__.py

pycif/plugins/meteos/dummy_csv/fetch.py

pycif/plugins/meteos/dummy_csv/fetch_meteo.py

pycif/plugins/meteos/dummy_csv/make.py

pycif/plugins/meteos/dummy_csv/read.py

pycif/plugins/minimizers/congrad/congrad.py

pycif/plugins/minimizers/congrad/wrevecs.py

pycif/plugins/minimizers/m1qn3/aux.py

pycif/plugins/minimizers/m1qn3/opt.py