new feat split subsets

run.py

src/data_generator.py

src/datastore.py

src/helpers.py

src/join.py

src/modules/__init__.py

src/modules/experiment_setup.py

src/modules/modules.py

src/modules/pre_processing.py

src/modules/run_environment.py

test/test_data_generator.py

test/test_helpers.py

test/test_modules.py

test/test_modules/test_experiment_setup.py

test/test_modules/test_pre_processing.py

test/test_modules/test_run_environment.py

test/test_statistics.py