Folder Watching (#1467)

* Hooked in a server setting to enable/disable folder watching

* Validated the file rename change event

* Validated delete file works

* Tweaked some logic to determine if a change occurs on a folder or a file.

* Added a note for an upcoming branch

* Some minor changes in the loop that just shift where code runs.

* Implemented ScanFolder api

* Ensure we restart watchers when we modify a library folder.

* Fixed a unit test

API/Parser/Parser.cs

@@ -1074,7 +1074,8 @@ namespace API.Parser
         /// <returns></returns>
         public static string NormalizePath(string path)
         {
-            return path.Replace(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar);
+            return path.Replace(Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar)
+                .Replace(@"//", Path.AltDirectorySeparatorChar + string.Empty);
         }
 
         /// <summary>