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correct 3 tests and temporarily removed outdated tests from test scope, this tests need an update with the new data handlers

split experiment path and name setup, replace parser inside ExpSetup by experiment_date parameter and add therefore args handling to all run scripts

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