Version 2.4.0 release and changelog.
Fix tolerance for primitive cell transformation.
PrimitiveCellTransformation now returns structures to unit cell.
Even better thresholding for primitive cell volume shrinkage.
Move primitive cell algo to be a method in Structure class.
Rename get_primitive to get_primitve_structure.
Improve documentation.
Minor comment changes
Merge branch 'master' of github.com:materialsproject/pymatgen
Simplify StructureMatcher internal code.
Cleanup StructureMatcher a bit more.
Surround cell reduction with try-except.
Remove niggli reduction in structure.get_primitive again
Add a FrameworkComparator, which matches sites only, and not actual species.
Remove redundant script.
More robust Niggli cell algo.
Structure matcher now uses niggli again for speed.
Fix bug in niggli cell algo.
Merge branch 'master' of github.com:materialsproject/pymatgen
Set limit on niggli cell algo.
Much more robust niggli cell finding.