Merge branch 'lukas_issue197_feat_mixed-sampling' into 'develop'

mlair/configuration/defaults.py

mlair/configuration/path_config.py

mlair/data_handler/data_handler_kz_filter.py

mlair/data_handler/data_handler_mixed_sampling.py

mlair/data_handler/data_handler_single_station.py

mlair/data_handler/default_data_handler.py

mlair/run_modules/experiment_setup.py

run_hourly_kz.py

run_mixed_sampling.py

test/test_configuration/test_path_config.py

test/test_run_modules/test_training.py