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/web/src/main/java/demo/web/StateMachineConfig.java

@@ -196,11 +196,11 @@ public class StateMachineConfig {
 
 	}
 
-	public static enum States {
+	public enum States {
 	    S0, S1, S11, S12, S2, S21, S211, S212
 	}
 
-	public static enum Events {
+	public enum Events {
 	    A, B, C, D, E, F, G, H, I, J, K
 	}