Merge branch 'dev'

CHANGELOG.md

docs/design.rst

docs/intro.rst

docs/tutorial/computing_descriptors.rst

miniff/__main__.py

miniff/_potentials.pyx

miniff/dyn.py

miniff/future.py

miniff/kernel.py

miniff/ml.py

miniff/ml_util.py

miniff/potentials.py

miniff/presentation.py

miniff/test_dyn.py

miniff/test_ewald.py

miniff/test_kernel.py

miniff/test_ml.py

miniff/test_ml_util.py

miniff/test_potentials.py

miniff/test_samples.py