Update README.md

Author: QianMo

Assets/Command Pattern/README.md

@@ -6,18 +6,21 @@ Encapsulate a request as an object, thereby letting you parameterize clients wit
 ![](https://github.com/QianMo/Unity-Design-Pattern/blob/master/UML_Picture/command.gif) 
 
 ##Participants
-
 The classes and objects participating in this pattern are:
 
 ###Command
 * declares an interface for executing an operation
+
 ###ConcreteCommand
 * defines a binding between a Receiver object and an action
 * implements Execute by invoking the corresponding operation(s) on Receiver
+
 ###Client 
 * creates a ConcreteCommand object and sets its receiver
+
 ###Invoker
 * asks the command to carry out the request
+
 ###Receiver
 * knows how to perform the operations associated with carrying out the request.