From #4420

Summary

Major changes:

• feature 1: Adds the class function core.trajectory.Trajectory.write_Gaussian_log, which writes a Gaussview readable ".log" file from the contents of a Trajectory object
  -- Allows mapping site properties to implemented Gaussian properties through the site_property_map argument
  --- Keys for implemented Gaussian properties stored in core.trajectory as constants with name format gview_<property>_key
  --- Currently implements mapping to
  ---- Mulliken (list[float])
  ---- ESP (list[float])
  ---- NBO (list[float])

Todos

• feature 1:
  -- Testing
  --- Making sure log files can be written without error
  --- Since Gaussview is a licensed product, (I believe) it cannot be booted up virtually to test if the produced files are actually readable. However, io.gaussian.GaussianOutput._parse could help us out here.