r preceeds s
Improve pair rule implementation. r and s should not be included and the intermediate descriptor lists should be kept a distinct until all pairs have been appended.
Don't restrict branch sorting.
Comparison in breath-first manner
Improved ghost loading at non-sigma bonds.
Use new Isotopes class.
Use more rules - duplicate rule doesn't make sense ATM.
Perception of interdependent auxiliary descriptors.
Always run auxiliary perception
Access X/Y from sign calculator (find implicit atoms).
New version of CDK and use in core (useful for debugging)
Ligands now know if their child arcs are sorted.
Better name for method to access the ‘real’ atoms.
Merge branch 'develop' of github.com:johnmay/centres into develop