merged latest unit branch

README.md

nifty/domain_object.py

nifty/energies/energy.py

nifty/minimization/quasi_newton_minimizer.py

nifty/nifty_meta.py

nifty/operators/composed_operator/composed_operator.py

nifty/operators/diagonal_operator/diagonal_operator.py

nifty/operators/fft_operator/fft_operator.py

nifty/operators/linear_operator/linear_operator.py

nifty/operators/projection_operator/projection_operator.py

nifty/operators/propagator_operator/propagator_operator.py

nifty/operators/smoothing_operator/smoothing_operator.py

nifty/plotting/__init__.py

nifty/plotting/colormap/__init__.py

nifty/plotting/colormap/colormaps.py

nifty/plotting/figures/figure_2D.py

nifty/plotting/figures/figure_base.py

nifty/plotting/figures/figure_from_plot.py

nifty/plotting/figures/multi_figure.py

nifty/plotting/plotly_wrapper.py