Added validate and sync processing when saving topic content.
Fixed a bug in the validation that would cause 500 errors to be thrown for certain errors.
Merge branch 'master' of github.com:pressgang-ccms/PressGangCCMSREST

Conflicts:
	src/main/java/org/jboss/pressgang/ccms/server/webdav/resources/hierarchy/topics/topic/fields/InternalResourceTopicContent.java