Making Memento function
Merge branch 'master' of https://github.com/YumouWang/CyberPoetrySlam

Conflicts:
	src/views/AbstractView.java
	test/controllers/ConnectControllerTest.java
	test/controllers/DisconnectVisitorTest.java
	test/controllers/HorizontalConnectionVisitorTest.java
	test/controllers/MouseInputControllerTest.java
	test/controllers/VerticalConnectionVisitorTest.java