http://wiki.fasterxml.com/JacksonFeatureBiDirReferences
http://jira.codehaus.org/browse/JACKSON-235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel
http://stackoverflow.com/questions/3325387/infinite-recursion-with-jackson-json-and-hibernate-jpa-issue