Employing Wannier functions
- eig66: Keep the gauge consistent by storing eig.hdf
 - Formatted vs. unformatted IO of files such as WF1.mmn, WF1.uHu, WF1.mmn0,...
 - MLWFs in nonmagnetic systems without SOC
 - MLWFs in magnetic systems without SOC
 - MLWFs with SOC and MLWFs for noncollinear magnets
 - Tutorial Examples
 - Wannier-related input and output files