Update docs

- Remove most of a static class modifiers from docs
  to make things easier if doing copy/paste. Not
  all can be removed because some spring inner
  config classes has to be static.
- Fixes #123

spring-statemachine-samples/zookeeper/src/main/java/demo/zookeeper/Application.java

@@ -88,11 +88,11 @@ public class Application  {
 
 	}
 
-	public static enum States {
+	public enum States {
 	    LOCKED, UNLOCKED
 	}
 
-	public static enum Events {
+	public enum Events {
 	    COIN, PUSH
 	}