ensures that the first atomIndex is the smaller one in BondStore.addBond
ensures that the first atomIndex is the smaller one in BondStore.addBond

fredludlow/ngl,arose/ngl,fredludlow/ngl,fredludlow/ngl,fredludlow/ngl,j0kaso/ngl,j0kaso/ngl,j0kaso/ngl,arose/ngl,arose/ngl,arose/ngl