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.
Fixed misleading method name; checks that the method is a setter that does _not_ return void.
Merge pull request #179 from lauriharpf/patch-44

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