corrected element selection for preview update
Merge branch 'develop' of git://github.com/sulu-cmf/SuluContentBundle into feature/preview-websocket
removed echo commands with logs
Merge branch 'feature/preview-websocket' into develop
Merge branch 'develop' of git://github.com/sulu-cmf/SuluContentBundle into feature/preview-websocket-communication

Conflicts:
	Preview/PreviewMessageComponent.php