Bug fix for rotoreflection.
Point group analyzer.
More cleanup.
Plenty of simplification and cleanup for pointgroup code.
More streamlining and use of python idioms.
Improve docs.
Minor spelling error.
 More doc updates.
Add support for mson/json to smartio.
Add read_mol, write_mol to smartio.
Remove vasprunxml from mol options.
Many unittests for smartio. Add write_file method to GaussianInput.
Update doc.
Massive update to usage docs, with new tutorial to Molecule functionality.
Update docs.
Add a D5d molecule for symmetry testing.
Speed up point group code.
fixed bug in timestep sampling for diffusion_analyzer. Now actually limits number of dt
samples to 200.
Merge branch 'master' of github.com:materialsproject/pymatgen
modify Vasprun to store the ionic_step_skip parameter