v0.6.0

This release requires COLMAP 3.9.1.

• Make glog usable in Python (#237)
• Add example.py (#237)
• Add incremental mapping callbacks (#238)
• Minimal bindings for the database (#238)
• Bugfix in CreateSummary (#241)
• Make objects pickleable (#243)
  • To enable this, todict() now only exports data attributes
  • Rotation3d.quat becomes a property
  • {Rigid3d,Sim3d}.matrix becomes a function
  • Image.num_points2D becomes a function
• Bind essential matrix utilities (#244)
• Autocast numpy.ndarray <-> std::vector<Eigen::Vector> (#248)
• Transform many points at once (#250)
  • Remove Image.{project,transform_to_image,transform_to_world}

Full Changelog: v0.5.0...v0.6.0