Properly migrate HiSPARC data from /databases/kascade to the datastore

[153957]

In /databases/kascade there is still about 2 years worth of event data from the station at KASCADE. This should be migrated to the datastore, which already contains some data from the KASCADE station. Note that the current cluster name (karlsruhe) and station number (70001) are different from how they are stored in unmigrated kascade files (kascade, 601).

The directory also contains the KASCADE experiment data (HiSparc-new.dat.gz), I think that at least a HDF5 version should also be stored for easier access (using sapphire.kascade.StoreKascadeData).