path inside a data handler is more often parsed as arg to enable further inheritance adjustments, data handler data is now stored separatly from the raw data location and inside experiment, data_path lost sampling attribute (is added by the handler itself),

correct 3 tests and temporarily removed outdated tests from test scope, this tests need an update with the new data handlers

moved helpers into new location, this is a commit only on the already finished doc strings, tests fail potentially fail with this part-wise commit

implemented test for history plot, monitoring plots adjust now if there is single or multiple output branches and if mse is available as metric

renamed data_store.put -> set, model class must include now the settings (removed from model_setup.py)