Introduce WebService

[nikolagsiderov]

Game plan:

1. Implement BaseWebService class
2. BaseWebService should somehow get its information from BaseFacade
3. BaseWebService's functions:

• IEnumerable GetCollection()/(context)
• IEnumerable GetEntity(id)/(context)
• void/T Save(T entity)
• void/T Delete(T entity)

After all that implement CarWebService and ServiceBookLogWebService and make them inherit BaseWebService.

NOTE: The difference between the WebService and the Facade is that the WebService should work only with ViewModels and the Facade should work only with DbModels. The conversion from ViewModel to DbModel should be done in the WebService