Merge branch 'staging' into 'master'

.gitmodules

3rdparty/atomic-features-package

3rdparty/atomic-features-package/MANIFEST.in

3rdparty/atomic-features-package/README.md

...y/atomic-features-package/atomicfeaturespackage/CHANGELOG

...ic-features-package/atomicfeaturespackage/CONTRIBUTING.md

...atomic-features-package/atomicfeaturespackage/LICENSE.txt

...atomic-features-package/atomicfeaturespackage/MANIFEST.in

...y/atomic-features-package/atomicfeaturespackage/README.md

...atomic-features-package/atomicfeaturespackage/__init__.py

...ackage/atomicfeaturespackage/atomicproperties/__init__.py

...featurespackage/atomicproperties/atomic_properties_dft.py

...urespackage/atomicproperties/atomic_properties_lda2015.py

...aturespackage/atomicproperties/atomic_properties_pymat.py

...e/atomicfeaturespackage/atomicproperties/periodictable.py

...icfeaturespackage/data/dft/no_spin_hse06_really_tight.csv

...micfeaturespackage/data/dft/no_spin_pbe0_really_tight.csv

...omicfeaturespackage/data/dft/no_spin_pbe_really_tight.csv

...cfeaturespackage/data/dft/no_spin_pbesol_really_tight.csv

...cfeaturespackage/data/dft/no_spin_pw-lda_really_tight.csv