Renamed MudEngine.FileSystem folder to MudEngine.DAL (Data Access Layer)

Deleted the Attributes folder as it is no longer used.
Moved Server.cs from Networking to Communication folder.

Classes all still reside within their original namespaces, just migrating files into their new folders.  Namespace migration will take place afterwards.

MudEngine/DAL/SaveDataTypes.cs

@@ -0,0 +1,11 @@
+namespace MudEngine.FileSystem
+{
+    public enum SaveDataTypes
+    {
+        Root,
+        Player,
+        Currencies,
+        Realms,
+        Zones,
+    }
+}