refactor(directives): finish service-panel and service-item directives

- FINALLY SUCCEED TO BIND CONTROLLER <-> VIEWS <-> DIRECTIVES SCOPE <-> DIRECTIVES CONTROLLER <-> DIRECTIVES VIEW!!! Great success!!! :D
- Use Controller As for every controllers in to application
- Implement controllerAs + controller + link methods in directives
- New use of services inside of controller: now services are binded to a local vm.Service variable, which is then used everywhere. Services are so only used once in the initial Controller call
- Many clean ups, refactor and style correction in directives, services and controllers