add an option in boltztrap to run single band interpolation (FERMI option)
add a method to get the min and max of a chemical potential for a specific phase (useful for defect computations)
modify the from_dict in BandStructure to store a structure if one is given (even if no projections are present)
Merge branch 'master' of github.com:materialsproject/pymatgen

Conflicts:
	pymatgen/electronic_structure/boltztrap.py
	pymatgen/phasediagram/pdanalyzer.py