fix converge_kpoints due to PoscarErrorHandler being incorporated into VaspErrorHandler
Consolidate the backup function into the main custodian module.
REmove accidental files.
Merge branch 'master' of github.com:materialsproject/custodian
DRY. Consolidate gzip_dir method in custodian.
Improve doc.
Add ZBRENT error.
v0.4.3 release.
Add nwchem to README.
Fix README.
Update doc for custodian.
Use argparse for run_nwchem.
Fix gzip for custodian
Update version.
Update changelog.
Update docs.
Add start and end time to run.log for custodian. Easier to check run times from
command line.
Merge branch 'master' of github.com:materialsproject/custodian
Add a scratch directory option for VASP runs.
Fix copy in scratch director.