Fixes to group definitions in Intra_R_Add_Endocylic

-R6_RSR was missing a label, *6, on one of it's atoms. Its parent and all
it's children had the *6 label, so I'm fairly sure it was just a typo. (0
rules affected)

-carbonyl_intra atom changed from O {1,D} to Od {1,D}. Same fix for all
its children: carbonyl_intra_H, carbonyl_intra_Nd, carbonyl_intra_De (0
rules for all groups affected)
Fixes to Disproportionation family

-For three rules: changed atom from C to Ct for group Ct_rad/Ct.

-For rule Ct_rad;O_Csrad, the original rule was for C2H + CH2OH --> C2H2 +
CH2O, but the group has been changed to be inclusive for nitrogen. Since
we have an original reaction, I decided to make a training reaction and
remove this rule.

I found the last error serendipitously because the rule's adjList was
mismatched with the groups. I don't have a systematic check for when rules
may not be applicable to expanding rules.