v1.0.4

- Added `ElementResolver`:
- `ClassReflection`:
  - Added resolvers:
    `fieldResolver`, `staticFieldResolver`, `methodResolver`, `staticMethodResolver`.
  - Optimized `toJson` to resolve faster `MethodReflection` of `obj.toJson`.
- Changed `FieldReflection` to allow `withObject`.
- Changed `MethodReflection` to allow `withObject`.
- Added `ReflectionFactory.toJsonEncodable`.
- Improve API Documentation.
- Fix issue with operator overloading.