Add stable_py3 with py3.4.1 test for circle.
No ASE with Py3k.
Merge branch 'pmg3' into stable_py3
Remove pypissh.
Merge branch 'master' into stable_py3
Merge branch 'master' into stable_py3
Upgrade setuptools on CircleCI.
Add pillow to cicle.
Merge branch 'master' into stable_py3

Conflicts:
	circle.yml
Merge branch 'master' into stable_py3
Merge branch 'master' into stable_py3
Rm py2.7 site packages.
Upgrade setuptools.
Merge branch 'master' into stable_py3
Merge branch 'master' into stable_py3
Refactor get_distance_and_image from PeriodicSite to Lattice. This allows the
Lattice method to get the distance and jimage between two arbitrary frac_coords
without creating a site (useful in a lot of instances).
Increment monty version. Move all decorators and lazy to monty.
Add pickle test for structures. Remove singleton decorator for PT.
Fix pickling for periodictable.
Merge remote-tracking branch 'mpmaster/master'

Conflicts:
	pymatgen/core/tests/test_periodic_table.py