Fix units.
Merge branch 'master' into pmg3
All core classes seem to be py3k compatible.
Fix Lattice unittests.
electronic structure is now py3k compatible.
Entries now py3k compatible.
Add from io import open.
Fix tests.
vaspio is now py3k compatible.
Utils are py3k compatible.
More fixes.
Merge branch 'master' of https://github.com/tschaume/pymatgen
More Py3k updates.
More Py3k.
Vaspio set now Py3k compatible.
Fix borg test.
More Py3k changes.