- Fixed a bug that prevented file output from `SpectrumData` when `state_table` was `None`
- Refactored test suite, now using `pytest` (files generating test data are available separately)
- Added support for writing `QuantumSystem` parameters to h5
- Added support for initializing QuantumSystem parameters by reading from h5
- Removed `dict_reformat`, fall back `to __dict__` instead (works with h5)
- Pytest: fixed numpy 32/64bit issue affecting initialization of qubit parameters when reading from h5, on certain machines