Draft: Create a container for neutral objects
Implements #104. Due to the requirements of the (several) calorimeter reconstruction tools, it is preferred to avoid having a SIMD-type based container for neutral objects. We rely on the use of the zip machinery together with the construction of SIMD-type objects on the fly from the information of the underlying objects.
Used on Rec!2639 (closed) and Moore!1200
(related also to Phys!1024 (closed))
Edited by Miguel Ramos Pernas