UrlHandlers command implemented and tested. Print MPD version in test.

LibMpc/Commands/Commands.Reflection.cs

@@ -41,7 +41,18 @@ namespace LibMpc
                 }
             }
 
-            // TODO: urlhandlers
+            public class UrlHandlers : IMpcCommand<IEnumerable<string>>
+            {
+                public string Value => "urlhandlers";
+
+                public IEnumerable<string> FormatResponse(IList<KeyValuePair<string, string>> response)
+                {
+                    var result = response.Where(item => item.Key.Equals("handler")).Select(item => item.Value);
+
+                    return result;
+                }
+            }
+
             // TODO: decoders
         }
     }

LibMpc/Mpc.cs

@@ -24,6 +24,7 @@ namespace LibMpc
         }
 
         public bool IsConnected => _connection?.IsConnected ?? false;
+        public string Version => _connection?.Version ?? "Unknown";
 
         public async Task<bool> ConnectAsync()
         {