Solve all the things!

[sglyon]

We need to solve the following models

• 1a1gtc
• 2a1gtc
• 1a2gtc
• 2a2gtc
• 1a1grc
• 2a1grc
• 1a2grc
• 2a2grc
• 1a1gts
• 2a1gts
• 1a2gts
• 2a2gts
• 1a1grs
• 2a1grs
• 1a2grs
• 2a2grs

[sglyon]

I think that all the time additive cases should be just special cases of the recursive model with rho == alpha --> true.

Thus, if we are happy with the performance of the recursive model (that's the big gain I see from attacking the additive model directly), we should be able to just call the same code with that restriction imposed.

[cc7768]

I was worried there would be algebra that made things blow up, but I hadn't thought about this. If simply letting rho = alpha gives us time-additive then we should forget having subdirectories especially for time-additive. I will make this change.

[sglyon]

Let's not blow things up quite yet.

It worked for the 1a1g(r|t)s model, but that doesn't mean it will work for all of them