making VRaptorGsonBuilder a component. This way we can inject it in projects that uses VRaptor.
removing VRaptorGsonBuilderCreator. Letting VRaptorGsonBuilder constructor do the job
renaming VraptorGsonBuilder -> VRaptorGsonBuilder
removing duplicated code
refactoring code to make it cleaner
adding missing @Component to VRaptorGsonBuilder
refactoring to make code cleaner
making test even better...extracting some method
Merge pull request #561 from nykolaslima/VRaptorGsonBuilder_as_a_component

making VRaptorGsonBuilder a component