Adds debug verb for pooling
Created by: clusterfack
I think pooling is a thing that has very few bugs due to the way I've simplified it to the extreme and thus this debug verb in an ideal world shouldn't be needed.
But we don't live in an ideal world as you can clearly see http://www.byond.com/forum/?post=2080853
This lets you view all the stored variables for a pooled variable type (assuming it has already been pooled at least once)