Added documentation

MANIFEST.in

__pycache__/setup.cpython-36.pyc

atomicfeaturespackage/MANIFEST.in

atomicfeaturespackage/__pycache__/__init__.cpython-36.pyc

...kage/atomicproperties/__pycache__/__init__.cpython-36.pyc

...operties/__pycache__/atomic_properties_dft.cpython-36.pyc

...ties/__pycache__/atomic_properties_lda2015.cpython-36.pyc

...rties/__pycache__/atomic_properties_magpie.cpython-36.pyc

...erties/__pycache__/atomic_properties_pymat.cpython-36.pyc

...atomicproperties/__pycache__/periodictable.cpython-36.pyc

atomicfeaturespackage/docs/Makefile

...d/doctrees/atomicfeaturespackage.atomicproperties.doctree

...ackage/docs/_build/doctrees/atomicfeaturespackage.doctree

...cs/_build/doctrees/atomicfeaturespackage.metainfo.doctree

...icfeaturespackage/docs/_build/doctrees/environment.pickle

atomicfeaturespackage/docs/_build/doctrees/index.doctree

atomicfeaturespackage/docs/_build/doctrees/modules.doctree

atomicfeaturespackage/docs/_build/html/.buildinfo

...l/_sources/atomicfeaturespackage.atomicproperties.rst.txt

...uild/html/_sources/atomicfeaturespackage.metainfo.rst.txt