restructured experiment setup, therefore deactivated some functionality in run.py and modules.py (tests fill probably fail now!)

can look in superior scopes too, can list all names available in data store, return either just object name or (name, scope, value) in search scope, /close #24

first implementation of data store with 2 different designs but same functionality, not decided yet which representation is more suitable

split run.py into experiment_setup.py and modules.py (includes preprocessing, training, postprocessing)

See merge request toar/machinelearningtools!7