Issue #138 : Update to Spring 3.2
Merge branch 'master' of https://github.com/resthub/resthub-spring-stack
Issue #123 : Support messages in addition to status code in Spring MVC exception resolver

Migrate to new Spring 3.2 behaviour based on @ControllerAdvice and ResponseEntityExceptionHandler. Initial implementation of RestError based on https://github.com/stormpath/spring-mvc-rest-exhandler
Merge pull request #173 from sdeleuze/master

Update to Spring 3.2 + initial support for error messages