Add base security support

- Add base of support using spring security to
  protect events, transitions and actions.
- Fixes #114

spring-statemachine-samples/security/src/main/resources/logback.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+    <include resource="org/springframework/boot/logging/logback/base.xml"/>
+
+    <logger name="org.springframework.statemachine" level="TRACE"/>
+
+</configuration>