Refactor JPA to proper Spring data

...n/src/main/java/mozen/business/CustomLayerRepository.java

mozen/src/main/java/mozen/business/IModelDao.java

mozen/src/main/java/mozen/business/IModelManager.java

mozen/src/main/java/mozen/business/IUserDao.java

mozen/src/main/java/mozen/business/IUserManager.java

mozen/src/main/java/mozen/business/ModelDao.java

mozen/src/main/java/mozen/business/ModelManager.java

mozen/src/main/java/mozen/business/ModelRepository.java

mozen/src/main/java/mozen/business/SpringBusinessConfig.java

...n/src/main/java/mozen/business/TagCategoryRepository.java

mozen/src/main/java/mozen/business/TagRepository.java

mozen/src/main/java/mozen/business/UserDao.java

mozen/src/main/java/mozen/business/UserManager.java

mozen/src/main/java/mozen/business/UserRepository.java

mozen/src/main/java/mozen/utils/DatabaseFiller.java

mozen/src/main/java/mozen/web/ModelController.java