Can now detect when the AmberPrm file changes the atom order because of

non-contiguous molecules. The reordering info is passed to the frame parsers
when the files are loaded so that they can transparently reorder the
frame data as it is read.

doc/source/changelog.rst

@@ -135,15 +135,15 @@ organisation on `GitHub <https://github.com/openbiosim/sire>`__.
   enables the user to specify which perturbable properties to use,
   e.g. ``map={"dihedral0": "dihedral_a", "dihedral1": "dihedral_b"}``.
 
-* Please add an item to this changelog when you create your PR
-
 * Added more support for Boresch restraints. Specifically, :func:`sire.restraints.boresch`
   now supports the specification of equilibrium values, uses different default force
-  constants, and warns the user if the restraints are likely to be unstable. 
+  constants, and warns the user if the restraints are likely to be unstable.
   :func:`sire.restraints.get_standard_state_correction` was implemented for Boresch
   restraints. Tests were added for restraint creation and for the standard state
   correction. Boresch restraints were added to :doc:`tutorial <tutorial/part06/03_restraints>`.
 
+* Please add an item to this changelog when you create your PR
+
 `2023.5.1 <https://github.com/openbiosim/sire/compare/2023.5.0...2023.5.1>`__ - January 2024
 --------------------------------------------------------------------------------------------