Orientation correction after dictionary indexing (and PC correction) before refinement

[hakonanes]

We should provide dynamic orientation and projection center corrections following the procedure in Singh et al. (2017). Python versions were implemented by @friedkitteh in his thesis. I think both corrections can be available as separate methods to the EBSDDetector.

[hakonanes]

Duplicate of #352:

We should add a projection/pattern center (PC) calculation method to kikuchipy.detectors.EBSDDetector which populates a map of navigation shape with PCs from the geometrical relations in Eqs. (8) and (9) in Appendix A in Singh et al. (2017).

This could then be used as a first approximation of PCs per point, instead of a constant PC, in orientation and/or PC refinement following dictionary indexing, given that the detector pixel size and navigation step size in both directons are known.

[hakonanes]

These resources from the xcdskd package could be of interest as well:

• https://github.com/wiai/xcdskd/blob/master/src/aloe/exp/calibpc.py
• https://github.com/wiai/xcdskd/blob/master/src/aloe/exp/pcfitter.py

[hakonanes]

Extrapolation of a mean PC to a map of PCs was added in #587 with a tutorial added in #588. The update to orientations given an update in the PC remains to be added.