title: EF5 stored procedure issue
body: <p>I have an entity which uses a stored procedure for the <code>Insert</code> method. The insert operation works fine, but I am currently unable to delete records. I get this error: </p>
  
  <blockquote>
    <p><em>System.Data.Entity.Infrastructure.DbUpdateException:
    System.Data.Entity.Infrastructure.DbUpdateException: Cannot find the
    DeleteFunctionMapping for EntityType 'LoanDetail' in the mapping file.
    ---> System.Data.UpdateException: Cannot find the DeleteFunctionMapping for EntityType 'LoanDetail' in the mapping
    file.</em></p>
  </blockquote>
  
  <p>I read in Julie Lerman's book that specifying procs for all methods is no longer required. Was this a feature of version 4.x, which has now been tightened again?</p>