2013 Validity

This will resolve cfpb/hmda-pilot#49
The way I rewrote the description is how I interpreted their roundabout way of defining it. I believe thinking about it that way makes the rule clearer and that my code correctly implements those semantics. However your logic produces a different output provided I'm interpreting the if-then correctly. Here's a quick truth table that shows the difference. The variables are the conditions (Cr is 1 when coapplicantRace1 = 8 and so on), Correct is the result of my "correct" logic and Current is the result of yours: 

Cr | Ce | Cs |  | Correct | Current
:---: | :---: | :---: | --- | :----------: | :----------: 
0 | 0 | 0 |  | 1 | 1 
0 | 0 | 1 |  | 0 | 1 
0 | 1 | 0 |  | 0 | 1 
0 | 1 | 1 |  | 0 | 1 
1 | 0 | 0 |  | 1 | 0 
1 | 0 | 1 |  | 1 | 0 
1 | 1 | 0 |  | 1 | 0 
1 | 1 | 1 |  | 1 | 1 

V326 has the same issue and an equivalent truth table.