MC metadata saving update
MC metadata saving update

Now uses the new function to write dict to hdf5 that properly takes care
of nested dicts and different data types.

DiCarloLab-Delft/PycQED_py3,DiCarloLab-Delft/PycQED_py3,QudevETH/PycQED_py3,DiCarloLab-Delft/PycQED_py3