Started converting to Spring_Java-Config

- fmt:message not working, see
http://stackoverflow.com/questions/25961157/spring-messagesource-only-works-as-xml-not-as-spring-java-config
- security config not converted yet
- extracted messageSource config into I18nConfig for easier debugging
(see above stackoverflow link)
- moved any remaining xml config to classpath for easier path
definitions
- added jsp-api to pom (provided) because eclipse showed errors in tag
files