de-normalize item by name data. create counts during library scan for fast access.

MediaBrowser.Server.Implementations/Session/SessionManager.cs

@@ -85,11 +85,6 @@ namespace MediaBrowser.Server.Implementations.Session
             get { return _activeConnections.Values.OrderByDescending(c => c.LastActivityDate).ToList(); }
         }
 
-        /// <summary>
-        /// The _true task result
-        /// </summary>
-        private readonly Task _trueTaskResult = Task.FromResult(true);
-
         /// <summary>
         /// Logs the user activity.
         /// </summary>
@@ -339,6 +334,7 @@ namespace MediaBrowser.Server.Implementations.Session
                 // If the client isn't able to report this, then we'll just have to make an assumption
                 data.PlayCount++;
                 data.Played = true;
+                data.PlaybackPositionTicks = 0;
             }
 
             await _userDataRepository.SaveUserData(user.Id, key, data, CancellationToken.None).ConfigureAwait(false);