#1113 Link uml-reverse-mapper created class diagrams to readme, where needed

state/README.md

@@ -17,6 +17,7 @@ Objects for States
 Allow an object to alter its behavior when its internal state
 changes. The object will appear to change its class.
 
+## Class diagram
 ![alt text](./etc/state_1.png "State")
 
 ## Applicability