making VRaptorGsonBuilder a component

We can use `VRaptorGsonBuilder` to make serialization in "VRaptor way".

e.g.:
`vRaptorGsonBuilder.create().toJson(representation);`

In order to use `VRaptorGsonBuilder` in other projects, we need to make it a component to be injected through DI container.


With this changes we are also improving code quality, by receiving `VRaptorGsonBuilder` as a dependency, removing the responsability of `GsonJSONSerialization` of build it.