clean up reconstitute dates
to_dict -> as_dict()
update dependency versions
udpate reqs
more update deps
Composition.from_formula( --> Composition(
switch to hard -V since NERSC refuses to get their act together
SymmetryFinder->SpacegroupAnalyzer as per new PMG directive
remove troublesome unicode conversion a la Will
add VasprunXMLValidator
fix due to change in kwarg order in custodian
Merge remote-tracking branch 'origin/master' into snl_group_check