New boa forums

I think there should be an additional two forums under boas- pacific boas and sand boas. (Erycinae are considered their own subfamily after all, next to the Pythonidae and Boinae. They're called boas, and they are boids, but not true boas.)

Thank you for the suggestion. We'll take a look at how much traffic those boas get and consider the feasibility of having separate forums for them. :)