Minor comment changes
Merge branch 'master' of github.com:materialsproject/pymatgen
Fix import in unittest for transformations.
Add option for US LDA in Potcar. Add matgenie functionality to generate POTCARs.
Add to README an example.
Update version to 2.5.2b.
Update change log.
Found dangerous bug in structure matcher.
Add unittest for bad disrodered case of mtaching.
Cleanup.
More cleanup.
Yet more cleanup.
Fix minor bug in SymmetryFinder.
Fix bug in spacegroup to string method.
Some minor code formatting cleanup.
Added check to ensure cost matrix is square in linear assignment
increased the strictness of the check that the site groupings are the right
size.
Update spglib version.
Merge branch 'master' into surface