no more multi/ subdirectory

nifty5/__init__.py

nifty5/library/amplitude_model.py

nifty5/library/correlated_fields.py

nifty5/library/point_sources.py

nifty5/linearization.py

nifty5/multi_domain.py

nifty5/multi_field.py

nifty5/operators/block_diagonal_operator.py

nifty5/operators/chain_operator.py

nifty5/operators/field_adapter.py

nifty5/operators/linear_operator.py

nifty5/operators/null_operator.py

nifty5/operators/relaxed_sum_operator.py

nifty5/operators/scaling_operator.py

nifty5/operators/sum_operator.py

nifty5/sugar.py