Bypass a bug in matplotlib (grid of plots with nplots % 2 != 0)
 Force scheduler shutdown if the number of Task.Error is > MAX_NUM_ABIERRS
 Add YAML configuration file for PyFlowsScheduler.
 Add support for PAW files in XML format.
Merge remote-tracking branch 'mpmaster/master'
 Add ref_file(s) methods to PymatgenTest so that we can easily get the filepath(s) used for unit tests
 Add pawecutdg variable to DeltaFactor workflow.
 Fix typo in bandstructure calculation.
 Fix problem in netcdf reader.
Merge branch 'master' of https://github.com/gmatteo/pymatgen