Add base security support

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

gradle.properties

@@ -1,12 +1,14 @@
 springShellVersion=1.1.0.RELEASE
-springSecurityVersion=4.0.2.RELEASE
+springSecurityVersion=4.0.3.RELEASE
 junitVersion=4.12
 springVersion=4.2.2.RELEASE
 kryoVersion=2.24.0
 log4jVersion=1.2.17
 springBootVersion=1.2.5.RELEASE
 version=1.1.0.BUILD-SNAPSHOT
+mockitoVersion = 1.9.5
 hamcrestVersion=1.3
 springSessionVersion=1.0.2.RELEASE
 curatorVersion=2.8.0
 tomcatEmbedVersion=7.0.56
+servletApiVersion=3.0.1