Refactor Elements JavaBeans model classes and optimize memory consumption

[jxblum]

... as well as Object creation, which is per POJO/bean instance, currently.

Currently, a BeanModel object hierarchy is created for each instance of an Object (Class) type / POJO. Rather, it would be ideal if the BeanModel object hierarchy only needed to be created per Object (Class) type, not per instance.

Unfortunately, the way the Property (model) class was designed, it depends on the Object instance to get and set property values. Therefore, there needs to be clearer separation between model and instances of the model structure.