NN parameter class

[kronenthaler]

Implement a parameter class to encapsulate a dictionary so each NN can pass all the parameters during initialization if necessary using a single object.

This wrapper can use something based on templates to get the parameters on the right types:

@SuppressWarnings("unchecked")
public T get(String name){
return (T)params.get(name);
}
parameters.get("spike");