0.5.0 - pymatgen integration

[wolearyc]

This update adds pymatgen interfaces to ramannoodle. Through pymatgen, ramannoodle can talk with a much wider variety of DFT packages.

New features

• io.pymatgen module for interacting with pymatgen Structure's, Trajectory's, etc. 4984f65
• Added InterpolationModel.add_dof_from_pymatgen for building interpolation models from pymatgen objects. a6786f6
• Added ARTModel.add_art_from_pymatgen for building ART models from pymatgen objects 4984f65
• Added [pymatgen] install option group to enable pymatgen interfaces f3bd2b7

Improvements

• Explicitly specified public API using __all__ in __init__.py files f3bd2b7
• Reorganized scratch files written during testing f3bd2b7
• Made submodules private where appropriate f3bd2b7

Documentation

• Added a short pymatgen guide to the IO guide f3bd2b7
• Improved doc structure to better reflect public API (using private submodules) c20fa41
• TODO: Submit PR to pymatgen to list ramannoodle as an external package.