Several fixes

Fix Alerts bot not displaying several occurences in a row
Fix Script bot not displaying in console what it is performing
Fix IOException not caught when connection is lost

MinecraftClient/ChatBots/Script.cs

@@ -106,6 +106,7 @@ namespace MinecraftClient.ChatBots
                                     {
                                         sleepticks = 0; Update(); //Unknown command : process next line immediately
                                     }
+                                    else LogToConsole(instruction_line);
                                     break;
                             }
                         }