bug fix
merge dev; resolve conflict
use generalized density matrix to do embedding basis construction, works faster
some fixes
sweep parameter optimization and use restart
restart properly rewritten
localize embedded orbitals
localize orbital, a couple of parameters fixed
more robust
Merge branch 'master' of https://github.com/zhengbx/dmet_bcs
reviewed some changes
a bug in assign mean-field occupation
improved fitting -- Gerald's fitting (although still a mess, but working)

	modified:   dmet_exec.py
	modified:   dmetbcs.py
	modified:   settings.py
	modified:   utils.py
seperate fitting
forgot vcor_fit.py
move vloc fitting to an independent file
remove diis class