Not sure but the formatting of the reference looks better!
Short introduction phrase and use "for" instead of "of"
Move presentation of Olex2, cctbx, smtbx relations to introduction.

This is pretty much needed so that we can freely cite cctbx, smtbx and
ole2.refine throughout the body of the paper.
Consistently use macro \olexrefine throughout the document.

Change one olex2.refine to smtbx in appendix.
Affine constraints for scalar parameters and application to occupancies

This is in relation to my recent commits to the cctbx,
classes affine_scalar_parameter and affine_asu_occupancy_parameter.
Not readily available in Olex2 at the time of writing.