Class Cloning for Multi-Model
- Add two utilities, for cloning objects, and simple classes
- Add model to AgentSets' ctor as instance variable
- Add model to breeds as prototype variable
- Update AgentSet's asSet to include model
- Update breed ctors to use model argument
- Update Model to use these new ctors
- Remove extendedClass from Model
- Models: tested with all; backward compatable
- Update model.reset to use the model args