modified Composition.__eq__ to use the class defined amount tolerance
use chain in composition.__eq__
increased site position tolerance to be greater than error introduced by
converting to cif and back
Merge branch 'master' of github.com:materialsproject/pymatgen
iChange ntypat to ntypesp
Merge branch 'master' of github.com:materialsproject/pymatgen
Add inversion static constructor.
iSimplifyt code.
Add reflection.
Merge branch 'master' of github.com:materialsproject/pymatgen

Conflicts:
	pymatgen/core/operations.py