Add utf-8 coding to all source files.
Configure circle ci to automerge to stable_py3 branch for py3k testing.
cleanup in Structure.make_supercell
Merge branch 'master' of github.com:materialsproject/pymatgen
Separate ionic and electronic convergence properties in Vasprun
Fix circleCI script.
Merge branch 'master' of github.com:materialsproject/pymatgen
Merge branch 'master' into stable_py3

Conflicts:
	circle.yml
	pymatgen/util/decorators.py