Wcf assignment review. (ajinkya).

Description of files to be reviewed
- Employee.cs, Remark.cs => Data contracts related to employee
- IEmployeeRetrieval.cs, IEmployeeUpdate.cs => Service contracts
- Employee.svc => Service contract implementation
- Employees.cs => Manages the storage of Employees
- UpdateFault.cs => Fault contract class
- EmployeeTests.cs => Tests the API provided by Employees.cs