Resolves #44 (Primitive Wrappers ignored by Wildcard). Automatic mapping...

... is performed on field fooBar, as long as the following conditions are true:

 - Field fooBar is of primitive or primitive wrapper type
 - The class has a setFooBar method that takes a primitive or a primitive wrapper parameter. The parameter type must be autoboxable to the field type.
 - The class has a getFooBar method.