Added hardcoding of Substitution_O reaction family.

Since Substitution_O is its own reverse, the atom labels of *2 and *3
need to be swapped after applying the reaction recipe, or else the
reverse kinetics will not be estimatable. This will manifest as a large
number of errors of the form "ERROR: Couldn't find the rate constant for
reaction:" in the log. (Naturally, RMG will just merrily continue even
after hitting this supposed "error".)

Closes #276.

source/RMG/jing/rxn/TemplateReaction.java

@@ -301,7 +301,7 @@ else if (n4 != null)
                 //  RMG expects to find *1 and *2 in the same ChemGraph (for this rxn family)
                 //      but will instead find *1 and *3 in the same ChemGraph (if we've reached this far)
                 //  Need to switch *2 and *3
-                else if (k == null && rRT.name.equals("substitutionS")) {
+                else if (k == null && (rRT.name.equals("substitutionS") || rRT.name.equals("Substitution_O"))) {
                     ChemGraph cg1 = ((ChemGraph) fproduct.get(0));
                     ChemGraph cg2 = ((ChemGraph) fproduct.get(1));
                     Graph g1 = cg1.getGraph();