Originally, DynamicArrayHandle only automatically handled the default
type and storage lists. There was an internal subclass that expanded
that to user defined lists, but it was a bit inaccessible. This change
makes DynamicArrayHandle match the structure of DynamicCellSet. There is
now a templated base class named DynamicArrayHandleBase that can accept
any pair of lists. DynamicArrayHandle itself is really just a typedef of
DynamicArrayHandleBase with the default lists.