Linux fixes:

-Copy PropertyChanged.Fody.dll to Tools/Fody in MediaBrowser.Model.csproj
-Check if root for WebSocketServer.FlashAccessPolicyEnabled (port < 1024)
-Check resolution value !=0 before SetResolution
-Catch _userManager.RefreshUsersMetadata exception when running MB3 for the first time
-Fix _appHost.Init() missing argument
-FFmpeg: set default and execute permission(766) to ffmpeg and ffprobe
-FFmpeg: Detect the OS type and download the correct version 
-Rename MediaBrowser.WebDashboard/dashboard-ui/scripts/Itemdetailpage.js to itemdetailpage.js

MediaBrowser.Server.Implementations/EntryPoints/RefreshUsersMetadata.cs

@@ -28,7 +28,18 @@ namespace MediaBrowser.Server.Implementations.EntryPoints
         /// </summary>
         public async void Run()
         {
+            #if __MonoCS__
+            try
+            {
+                await _userManager.RefreshUsersMetadata(CancellationToken.None).ConfigureAwait(false);
+            }
+            catch
+            {
+                System.Console.WriteLine("RefreshUsersMetadata task error: No users? First time running?");
+            }
+            #else
             await _userManager.RefreshUsersMetadata(CancellationToken.None).ConfigureAwait(false);
+            #endif
         }
 
         /// <summary>